commit:     9a6d05b7a247feb26f16e24eb6a180e52f1bb30e
Author:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
AuthorDate: Sat Jan 29 17:40:11 2022 +0000
Commit:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
CommitDate: Sat Jan 29 17:40:11 2022 +0000
URL:        https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=9a6d05b7

Linux patch 5.16.4

Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org>

 0000_README             |    4 +
 1003_linux-5.16.4.patch | 1035 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 1039 insertions(+)

diff --git a/0000_README b/0000_README
index 1eb44c73..ff7d994b 100644
--- a/0000_README
+++ b/0000_README
@@ -55,6 +55,10 @@ Patch:  1002_linux-5.16.3.patch
 From:   http://www.kernel.org
 Desc:   Linux 5.16.3
 
+Patch:  1003_linux-5.16.4.patch
+From:   http://www.kernel.org
+Desc:   Linux 5.16.4
+
 Patch:  1500_XATTR_USER_PREFIX.patch
 From:   https://bugs.gentoo.org/show_bug.cgi?id=470644
 Desc:   Support for namespace user.pax.* on tmpfs.

diff --git a/1003_linux-5.16.4.patch b/1003_linux-5.16.4.patch
new file mode 100644
index 00000000..a5939fae
--- /dev/null
+++ b/1003_linux-5.16.4.patch
@@ -0,0 +1,1035 @@
+diff --git a/Makefile b/Makefile
+index acb8ffee65dc5..36ff4ed4763b3 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,7 +1,7 @@
+ # SPDX-License-Identifier: GPL-2.0
+ VERSION = 5
+ PATCHLEVEL = 16
+-SUBLEVEL = 3
++SUBLEVEL = 4
+ EXTRAVERSION =
+ NAME = Gobble Gobble
+ 
+diff --git a/arch/arm64/include/asm/extable.h 
b/arch/arm64/include/asm/extable.h
+index 8b300dd28defd..72b0e71cc3de8 100644
+--- a/arch/arm64/include/asm/extable.h
++++ b/arch/arm64/include/asm/extable.h
+@@ -33,15 +33,6 @@ do {                                                        
\
+       (b)->data = (tmp).data;                         \
+ } while (0)
+ 
+-static inline bool in_bpf_jit(struct pt_regs *regs)
+-{
+-      if (!IS_ENABLED(CONFIG_BPF_JIT))
+-              return false;
+-
+-      return regs->pc >= BPF_JIT_REGION_START &&
+-             regs->pc < BPF_JIT_REGION_END;
+-}
+-
+ #ifdef CONFIG_BPF_JIT
+ bool ex_handler_bpf(const struct exception_table_entry *ex,
+                   struct pt_regs *regs);
+diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
+index 1b9a1e2426127..0af70d9abede3 100644
+--- a/arch/arm64/include/asm/memory.h
++++ b/arch/arm64/include/asm/memory.h
+@@ -44,11 +44,8 @@
+ #define _PAGE_OFFSET(va)      (-(UL(1) << (va)))
+ #define PAGE_OFFSET           (_PAGE_OFFSET(VA_BITS))
+ #define KIMAGE_VADDR          (MODULES_END)
+-#define BPF_JIT_REGION_START  (_PAGE_END(VA_BITS_MIN))
+-#define BPF_JIT_REGION_SIZE   (SZ_128M)
+-#define BPF_JIT_REGION_END    (BPF_JIT_REGION_START + BPF_JIT_REGION_SIZE)
+ #define MODULES_END           (MODULES_VADDR + MODULES_VSIZE)
+-#define MODULES_VADDR         (BPF_JIT_REGION_END)
++#define MODULES_VADDR         (_PAGE_END(VA_BITS_MIN))
+ #define MODULES_VSIZE         (SZ_128M)
+ #define VMEMMAP_START         (-(UL(1) << (VA_BITS - VMEMMAP_SHIFT)))
+ #define VMEMMAP_END           (VMEMMAP_START + VMEMMAP_SIZE)
+diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
+index 7b21213a570fc..e8986e6067a91 100644
+--- a/arch/arm64/kernel/traps.c
++++ b/arch/arm64/kernel/traps.c
+@@ -994,7 +994,7 @@ static struct break_hook bug_break_hook = {
+ static int reserved_fault_handler(struct pt_regs *regs, unsigned int esr)
+ {
+       pr_err("%s generated an invalid instruction at %pS!\n",
+-              in_bpf_jit(regs) ? "BPF JIT" : "Kernel text patching",
++              "Kernel text patching",
+               (void *)instruction_pointer(regs));
+ 
+       /* We cannot handle this */
+diff --git a/arch/arm64/mm/ptdump.c b/arch/arm64/mm/ptdump.c
+index 1c403536c9bb0..9bc4066c5bf33 100644
+--- a/arch/arm64/mm/ptdump.c
++++ b/arch/arm64/mm/ptdump.c
+@@ -41,8 +41,6 @@ static struct addr_marker address_markers[] = {
+       { 0 /* KASAN_SHADOW_START */,   "Kasan shadow start" },
+       { KASAN_SHADOW_END,             "Kasan shadow end" },
+ #endif
+-      { BPF_JIT_REGION_START,         "BPF start" },
+-      { BPF_JIT_REGION_END,           "BPF end" },
+       { MODULES_VADDR,                "Modules start" },
+       { MODULES_END,                  "Modules end" },
+       { VMALLOC_START,                "vmalloc() area" },
+diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
+index 1090a957b3abc..71ef9dcd9b578 100644
+--- a/arch/arm64/net/bpf_jit_comp.c
++++ b/arch/arm64/net/bpf_jit_comp.c
+@@ -1145,15 +1145,12 @@ out:
+ 
+ u64 bpf_jit_alloc_exec_limit(void)
+ {
+-      return BPF_JIT_REGION_SIZE;
++      return VMALLOC_END - VMALLOC_START;
+ }
+ 
+ void *bpf_jit_alloc_exec(unsigned long size)
+ {
+-      return __vmalloc_node_range(size, PAGE_SIZE, BPF_JIT_REGION_START,
+-                                  BPF_JIT_REGION_END, GFP_KERNEL,
+-                                  PAGE_KERNEL, 0, NUMA_NO_NODE,
+-                                  __builtin_return_address(0));
++      return vmalloc(size);
+ }
+ 
+ void bpf_jit_free_exec(void *addr)
+diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_smu.c 
b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_smu.c
+index 8c2b77eb94593..162ae71861247 100644
+--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_smu.c
++++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_smu.c
+@@ -119,6 +119,12 @@ int dcn31_smu_send_msg_with_param(
+ 
+       result = dcn31_smu_wait_for_response(clk_mgr, 10, 200000);
+ 
++      if (result == VBIOSSMC_Result_Failed) {
++              ASSERT(0);
++              REG_WRITE(MP1_SMN_C2PMSG_91, VBIOSSMC_Result_OK);
++              return -1;
++      }
++
+       if (IS_SMU_TIMEOUT(result)) {
+               ASSERT(0);
+               dm_helpers_smu_timeout(CTX, msg_id, param, 10 * 200000);
+diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h 
b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+index da85169006d4f..a0aa6dbe120e2 100644
+--- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
++++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+@@ -305,6 +305,7 @@ struct drm_i915_gem_object {
+ #define I915_BO_READONLY          BIT(6)
+ #define I915_TILING_QUIRK_BIT     7 /* unknown swizzling; do not release! */
+ #define I915_BO_PROTECTED         BIT(8)
++#define I915_BO_WAS_BOUND_BIT     9
+       /**
+        * @mem_flags - Mutable placement-related flags
+        *
+diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c 
b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
+index 1d3f40abd0258..9053cea3395a6 100644
+--- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c
++++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
+@@ -10,6 +10,8 @@
+ #include "i915_gem_lmem.h"
+ #include "i915_gem_mman.h"
+ 
++#include "gt/intel_gt.h"
++
+ void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
+                                struct sg_table *pages,
+                                unsigned int sg_page_sizes)
+@@ -217,6 +219,14 @@ __i915_gem_object_unset_pages(struct drm_i915_gem_object 
*obj)
+       __i915_gem_object_reset_page_iter(obj);
+       obj->mm.page_sizes.phys = obj->mm.page_sizes.sg = 0;
+ 
++      if (test_and_clear_bit(I915_BO_WAS_BOUND_BIT, &obj->flags)) {
++              struct drm_i915_private *i915 = to_i915(obj->base.dev);
++              intel_wakeref_t wakeref;
++
++              with_intel_runtime_pm_if_active(&i915->runtime_pm, wakeref)
++                      intel_gt_invalidate_tlbs(&i915->gt);
++      }
++
+       return pages;
+ }
+ 
+diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c 
b/drivers/gpu/drm/i915/gt/intel_gt.c
+index 1cb1948ac9594..7df7bbf5845ee 100644
+--- a/drivers/gpu/drm/i915/gt/intel_gt.c
++++ b/drivers/gpu/drm/i915/gt/intel_gt.c
+@@ -30,6 +30,8 @@ void intel_gt_init_early(struct intel_gt *gt, struct 
drm_i915_private *i915)
+ 
+       spin_lock_init(&gt->irq_lock);
+ 
++      mutex_init(&gt->tlb_invalidate_lock);
++
+       INIT_LIST_HEAD(&gt->closed_vma);
+       spin_lock_init(&gt->closed_lock);
+ 
+@@ -907,3 +909,103 @@ void intel_gt_info_print(const struct intel_gt_info 
*info,
+ 
+       intel_sseu_dump(&info->sseu, p);
+ }
++
++struct reg_and_bit {
++      i915_reg_t reg;
++      u32 bit;
++};
++
++static struct reg_and_bit
++get_reg_and_bit(const struct intel_engine_cs *engine, const bool gen8,
++              const i915_reg_t *regs, const unsigned int num)
++{
++      const unsigned int class = engine->class;
++      struct reg_and_bit rb = { };
++
++      if (drm_WARN_ON_ONCE(&engine->i915->drm,
++                           class >= num || !regs[class].reg))
++              return rb;
++
++      rb.reg = regs[class];
++      if (gen8 && class == VIDEO_DECODE_CLASS)
++              rb.reg.reg += 4 * engine->instance; /* GEN8_M2TCR */
++      else
++              rb.bit = engine->instance;
++
++      rb.bit = BIT(rb.bit);
++
++      return rb;
++}
++
++void intel_gt_invalidate_tlbs(struct intel_gt *gt)
++{
++      static const i915_reg_t gen8_regs[] = {
++              [RENDER_CLASS]                  = GEN8_RTCR,
++              [VIDEO_DECODE_CLASS]            = GEN8_M1TCR, /* , GEN8_M2TCR */
++              [VIDEO_ENHANCEMENT_CLASS]       = GEN8_VTCR,
++              [COPY_ENGINE_CLASS]             = GEN8_BTCR,
++      };
++      static const i915_reg_t gen12_regs[] = {
++              [RENDER_CLASS]                  = GEN12_GFX_TLB_INV_CR,
++              [VIDEO_DECODE_CLASS]            = GEN12_VD_TLB_INV_CR,
++              [VIDEO_ENHANCEMENT_CLASS]       = GEN12_VE_TLB_INV_CR,
++              [COPY_ENGINE_CLASS]             = GEN12_BLT_TLB_INV_CR,
++      };
++      struct drm_i915_private *i915 = gt->i915;
++      struct intel_uncore *uncore = gt->uncore;
++      struct intel_engine_cs *engine;
++      enum intel_engine_id id;
++      const i915_reg_t *regs;
++      unsigned int num = 0;
++
++      if (I915_SELFTEST_ONLY(gt->awake == -ENODEV))
++              return;
++
++      if (GRAPHICS_VER(i915) == 12) {
++              regs = gen12_regs;
++              num = ARRAY_SIZE(gen12_regs);
++      } else if (GRAPHICS_VER(i915) >= 8 && GRAPHICS_VER(i915) <= 11) {
++              regs = gen8_regs;
++              num = ARRAY_SIZE(gen8_regs);
++      } else if (GRAPHICS_VER(i915) < 8) {
++              return;
++      }
++
++      if (drm_WARN_ONCE(&i915->drm, !num,
++                        "Platform does not implement TLB invalidation!"))
++              return;
++
++      GEM_TRACE("\n");
++
++      assert_rpm_wakelock_held(&i915->runtime_pm);
++
++      mutex_lock(&gt->tlb_invalidate_lock);
++      intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
++
++      for_each_engine(engine, gt, id) {
++              /*
++               * HW architecture suggest typical invalidation time at 40us,
++               * with pessimistic cases up to 100us and a recommendation to
++               * cap at 1ms. We go a bit higher just in case.
++               */
++              const unsigned int timeout_us = 100;
++              const unsigned int timeout_ms = 4;
++              struct reg_and_bit rb;
++
++              rb = get_reg_and_bit(engine, regs == gen8_regs, regs, num);
++              if (!i915_mmio_reg_offset(rb.reg))
++                      continue;
++
++              intel_uncore_write_fw(uncore, rb.reg, rb.bit);
++              if (__intel_wait_for_register_fw(uncore,
++                                               rb.reg, rb.bit, 0,
++                                               timeout_us, timeout_ms,
++                                               NULL))
++                      drm_err_ratelimited(&gt->i915->drm,
++                                          "%s TLB invalidation did not 
complete in %ums!\n",
++                                          engine->name, timeout_ms);
++      }
++
++      intel_uncore_forcewake_put_delayed(uncore, FORCEWAKE_ALL);
++      mutex_unlock(&gt->tlb_invalidate_lock);
++}
+diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h 
b/drivers/gpu/drm/i915/gt/intel_gt.h
+index 74e771871a9bd..c0169d6017c2d 100644
+--- a/drivers/gpu/drm/i915/gt/intel_gt.h
++++ b/drivers/gpu/drm/i915/gt/intel_gt.h
+@@ -90,4 +90,6 @@ void intel_gt_info_print(const struct intel_gt_info *info,
+ 
+ void intel_gt_watchdog_work(struct work_struct *work);
+ 
++void intel_gt_invalidate_tlbs(struct intel_gt *gt);
++
+ #endif /* __INTEL_GT_H__ */
+diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h 
b/drivers/gpu/drm/i915/gt/intel_gt_types.h
+index 14216cc471b1b..f206877964908 100644
+--- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
++++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
+@@ -73,6 +73,8 @@ struct intel_gt {
+ 
+       struct intel_uc uc;
+ 
++      struct mutex tlb_invalidate_lock;
++
+       struct i915_wa_list wa_list;
+ 
+       struct intel_gt_timelines {
+diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
+index bcee121bec5ad..14ce8809efdd5 100644
+--- a/drivers/gpu/drm/i915/i915_reg.h
++++ b/drivers/gpu/drm/i915/i915_reg.h
+@@ -2697,6 +2697,12 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
+ #define   GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING    (1 << 28)
+ #define   GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT      (1 << 24)
+ 
++#define GEN8_RTCR     _MMIO(0x4260)
++#define GEN8_M1TCR    _MMIO(0x4264)
++#define GEN8_M2TCR    _MMIO(0x4268)
++#define GEN8_BTCR     _MMIO(0x426c)
++#define GEN8_VTCR     _MMIO(0x4270)
++
+ #if 0
+ #define PRB0_TAIL     _MMIO(0x2030)
+ #define PRB0_HEAD     _MMIO(0x2034)
+@@ -2792,6 +2798,11 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
+ #define   FAULT_VA_HIGH_BITS          (0xf << 0)
+ #define   FAULT_GTT_SEL                       (1 << 4)
+ 
++#define GEN12_GFX_TLB_INV_CR  _MMIO(0xced8)
++#define GEN12_VD_TLB_INV_CR   _MMIO(0xcedc)
++#define GEN12_VE_TLB_INV_CR   _MMIO(0xcee0)
++#define GEN12_BLT_TLB_INV_CR  _MMIO(0xcee4)
++
+ #define GEN12_AUX_ERR_DBG             _MMIO(0x43f4)
+ 
+ #define FPGA_DBG              _MMIO(0x42300)
+diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
+index bef795e265a66..cb288e6bdc020 100644
+--- a/drivers/gpu/drm/i915/i915_vma.c
++++ b/drivers/gpu/drm/i915/i915_vma.c
+@@ -431,6 +431,9 @@ int i915_vma_bind(struct i915_vma *vma,
+               vma->ops->bind_vma(vma->vm, NULL, vma, cache_level, bind_flags);
+       }
+ 
++      if (vma->obj)
++              set_bit(I915_BO_WAS_BOUND_BIT, &vma->obj->flags);
++
+       atomic_or(bind_flags, &vma->flags);
+       return 0;
+ }
+diff --git a/drivers/gpu/drm/i915/intel_uncore.c 
b/drivers/gpu/drm/i915/intel_uncore.c
+index e072054adac57..e21c779cb487f 100644
+--- a/drivers/gpu/drm/i915/intel_uncore.c
++++ b/drivers/gpu/drm/i915/intel_uncore.c
+@@ -724,7 +724,8 @@ void intel_uncore_forcewake_get__locked(struct 
intel_uncore *uncore,
+ }
+ 
+ static void __intel_uncore_forcewake_put(struct intel_uncore *uncore,
+-                                       enum forcewake_domains fw_domains)
++                                       enum forcewake_domains fw_domains,
++                                       bool delayed)
+ {
+       struct intel_uncore_forcewake_domain *domain;
+       unsigned int tmp;
+@@ -739,7 +740,11 @@ static void __intel_uncore_forcewake_put(struct 
intel_uncore *uncore,
+                       continue;
+               }
+ 
+-              fw_domains_put(uncore, domain->mask);
++              if (delayed &&
++                  !(domain->uncore->fw_domains_timer & domain->mask))
++                      fw_domain_arm_timer(domain);
++              else
++                      fw_domains_put(uncore, domain->mask);
+       }
+ }
+ 
+@@ -760,7 +765,20 @@ void intel_uncore_forcewake_put(struct intel_uncore 
*uncore,
+               return;
+ 
+       spin_lock_irqsave(&uncore->lock, irqflags);
+-      __intel_uncore_forcewake_put(uncore, fw_domains);
++      __intel_uncore_forcewake_put(uncore, fw_domains, false);
++      spin_unlock_irqrestore(&uncore->lock, irqflags);
++}
++
++void intel_uncore_forcewake_put_delayed(struct intel_uncore *uncore,
++                                      enum forcewake_domains fw_domains)
++{
++      unsigned long irqflags;
++
++      if (!uncore->fw_get_funcs)
++              return;
++
++      spin_lock_irqsave(&uncore->lock, irqflags);
++      __intel_uncore_forcewake_put(uncore, fw_domains, true);
+       spin_unlock_irqrestore(&uncore->lock, irqflags);
+ }
+ 
+@@ -802,7 +820,7 @@ void intel_uncore_forcewake_put__locked(struct 
intel_uncore *uncore,
+       if (!uncore->fw_get_funcs)
+               return;
+ 
+-      __intel_uncore_forcewake_put(uncore, fw_domains);
++      __intel_uncore_forcewake_put(uncore, fw_domains, false);
+ }
+ 
+ void assert_forcewakes_inactive(struct intel_uncore *uncore)
+diff --git a/drivers/gpu/drm/i915/intel_uncore.h 
b/drivers/gpu/drm/i915/intel_uncore.h
+index 3248e4e2c540c..d08088fa4c7e9 100644
+--- a/drivers/gpu/drm/i915/intel_uncore.h
++++ b/drivers/gpu/drm/i915/intel_uncore.h
+@@ -243,6 +243,8 @@ void intel_uncore_forcewake_get(struct intel_uncore 
*uncore,
+                               enum forcewake_domains domains);
+ void intel_uncore_forcewake_put(struct intel_uncore *uncore,
+                               enum forcewake_domains domains);
++void intel_uncore_forcewake_put_delayed(struct intel_uncore *uncore,
++                                      enum forcewake_domains domains);
+ void intel_uncore_forcewake_flush(struct intel_uncore *uncore,
+                                 enum forcewake_domains fw_domains);
+ 
+diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h 
b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+index 2a7cec4cb8a89..f9f28516ffb41 100644
+--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
++++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+@@ -1112,15 +1112,14 @@ extern int vmw_execbuf_fence_commands(struct drm_file 
*file_priv,
+                                     struct vmw_private *dev_priv,
+                                     struct vmw_fence_obj **p_fence,
+                                     uint32_t *p_handle);
+-extern void vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv,
++extern int vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv,
+                                       struct vmw_fpriv *vmw_fp,
+                                       int ret,
+                                       struct drm_vmw_fence_rep __user
+                                       *user_fence_rep,
+                                       struct vmw_fence_obj *fence,
+                                       uint32_t fence_handle,
+-                                      int32_t out_fence_fd,
+-                                      struct sync_file *sync_file);
++                                      int32_t out_fence_fd);
+ bool vmw_cmd_describe(const void *buf, u32 *size, char const **cmd);
+ 
+ /**
+diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c 
b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+index 5f2ffa9de5c8f..9144e8f88c812 100644
+--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
++++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+@@ -3823,17 +3823,17 @@ int vmw_execbuf_fence_commands(struct drm_file 
*file_priv,
+  * Also if copying fails, user-space will be unable to signal the fence object
+  * so we wait for it immediately, and then unreference the user-space 
reference.
+  */
+-void
++int
+ vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv,
+                           struct vmw_fpriv *vmw_fp, int ret,
+                           struct drm_vmw_fence_rep __user *user_fence_rep,
+                           struct vmw_fence_obj *fence, uint32_t fence_handle,
+-                          int32_t out_fence_fd, struct sync_file *sync_file)
++                          int32_t out_fence_fd)
+ {
+       struct drm_vmw_fence_rep fence_rep;
+ 
+       if (user_fence_rep == NULL)
+-              return;
++              return 0;
+ 
+       memset(&fence_rep, 0, sizeof(fence_rep));
+ 
+@@ -3861,20 +3861,14 @@ vmw_execbuf_copy_fence_user(struct vmw_private 
*dev_priv,
+        * handle.
+        */
+       if (unlikely(ret != 0) && (fence_rep.error == 0)) {
+-              if (sync_file)
+-                      fput(sync_file->file);
+-
+-              if (fence_rep.fd != -1) {
+-                      put_unused_fd(fence_rep.fd);
+-                      fence_rep.fd = -1;
+-              }
+-
+               ttm_ref_object_base_unref(vmw_fp->tfile, fence_handle,
+                                         TTM_REF_USAGE);
+               VMW_DEBUG_USER("Fence copy error. Syncing.\n");
+               (void) vmw_fence_obj_wait(fence, false, false,
+                                         VMW_FENCE_WAIT_TIMEOUT);
+       }
++
++      return ret ? -EFAULT : 0;
+ }
+ 
+ /**
+@@ -4212,16 +4206,23 @@ int vmw_execbuf_process(struct drm_file *file_priv,
+ 
+                       (void) vmw_fence_obj_wait(fence, false, false,
+                                                 VMW_FENCE_WAIT_TIMEOUT);
++              }
++      }
++
++      ret = vmw_execbuf_copy_fence_user(dev_priv, vmw_fpriv(file_priv), ret,
++                                  user_fence_rep, fence, handle, 
out_fence_fd);
++
++      if (sync_file) {
++              if (ret) {
++                      /* usercopy of fence failed, put the file object */
++                      fput(sync_file->file);
++                      put_unused_fd(out_fence_fd);
+               } else {
+                       /* Link the fence with the FD created earlier */
+                       fd_install(out_fence_fd, sync_file->file);
+               }
+       }
+ 
+-      vmw_execbuf_copy_fence_user(dev_priv, vmw_fpriv(file_priv), ret,
+-                                  user_fence_rep, fence, handle, out_fence_fd,
+-                                  sync_file);
+-
+       /* Don't unreference when handing fence out */
+       if (unlikely(out_fence != NULL)) {
+               *out_fence = fence;
+@@ -4239,7 +4240,7 @@ int vmw_execbuf_process(struct drm_file *file_priv,
+        */
+       vmw_validation_unref_lists(&val_ctx);
+ 
+-      return 0;
++      return ret;
+ 
+ out_unlock_binding:
+       mutex_unlock(&dev_priv->binding_mutex);
+diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c 
b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
+index 9fe12329a4d58..b4d9d7258a546 100644
+--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
++++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
+@@ -1159,7 +1159,7 @@ int vmw_fence_event_ioctl(struct drm_device *dev, void 
*data,
+       }
+ 
+       vmw_execbuf_copy_fence_user(dev_priv, vmw_fp, 0, user_fence_rep, fence,
+-                                  handle, -1, NULL);
++                                  handle, -1);
+       vmw_fence_obj_unreference(&fence);
+       return 0;
+ out_no_create:
+diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c 
b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+index 74fa419092138..14e8f665b13be 100644
+--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
++++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+@@ -2516,7 +2516,7 @@ void vmw_kms_helper_validation_finish(struct vmw_private 
*dev_priv,
+       if (file_priv)
+               vmw_execbuf_copy_fence_user(dev_priv, vmw_fpriv(file_priv),
+                                           ret, user_fence_rep, fence,
+-                                          handle, -1, NULL);
++                                          handle, -1);
+       if (out_fence)
+               *out_fence = fence;
+       else
+diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h 
b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
+index 2b06d78baa086..a19dd6797070c 100644
+--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
++++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
+@@ -1850,6 +1850,14 @@ struct bnx2x {
+ 
+       /* Vxlan/Geneve related information */
+       u16 udp_tunnel_ports[BNX2X_UDP_PORT_MAX];
++
++#define FW_CAP_INVALIDATE_VF_FP_HSI   BIT(0)
++      u32 fw_cap;
++
++      u32 fw_major;
++      u32 fw_minor;
++      u32 fw_rev;
++      u32 fw_eng;
+ };
+ 
+ /* Tx queues may be less or equal to Rx queues */
+@@ -2525,5 +2533,6 @@ void bnx2x_register_phc(struct bnx2x *bp);
+  * Meant for implicit re-load flows.
+  */
+ int bnx2x_vlan_reconfigure_vid(struct bnx2x *bp);
+-
++int bnx2x_init_firmware(struct bnx2x *bp);
++void bnx2x_release_firmware(struct bnx2x *bp);
+ #endif /* bnx2x.h */
+diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c 
b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
+index e8e8c2d593c55..e57fe0034ce2a 100644
+--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
++++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
+@@ -2364,10 +2364,8 @@ int bnx2x_compare_fw_ver(struct bnx2x *bp, u32 
load_code, bool print_err)
+       if (load_code != FW_MSG_CODE_DRV_LOAD_COMMON_CHIP &&
+           load_code != FW_MSG_CODE_DRV_LOAD_COMMON) {
+               /* build my FW version dword */
+-              u32 my_fw = (BCM_5710_FW_MAJOR_VERSION) +
+-                      (BCM_5710_FW_MINOR_VERSION << 8) +
+-                      (BCM_5710_FW_REVISION_VERSION << 16) +
+-                      (BCM_5710_FW_ENGINEERING_VERSION << 24);
++              u32 my_fw = (bp->fw_major) + (bp->fw_minor << 8) +
++                              (bp->fw_rev << 16) + (bp->fw_eng << 24);
+ 
+               /* read loaded FW from chip */
+               u32 loaded_fw = REG_RD(bp, XSEM_REG_PRAM);
+diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_fw_defs.h 
b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_fw_defs.h
+index 3f8435208bf49..a84d015da5dfa 100644
+--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_fw_defs.h
++++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_fw_defs.h
+@@ -241,6 +241,8 @@
+       IRO[221].m2))
+ #define XSTORM_VF_TO_PF_OFFSET(funcId) \
+       (IRO[48].base + ((funcId) * IRO[48].m1))
++#define XSTORM_ETH_FUNCTION_INFO_FP_HSI_VALID_E2_OFFSET(fid)  \
++      (IRO[386].base + ((fid) * IRO[386].m1))
+ #define COMMON_ASM_INVALID_ASSERT_OPCODE 0x0
+ 
+ /* eth hsi version */
+diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_hsi.h 
b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_hsi.h
+index 622fadc50316e..611efee758340 100644
+--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_hsi.h
++++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_hsi.h
+@@ -3024,7 +3024,8 @@ struct afex_stats {
+ 
+ #define BCM_5710_FW_MAJOR_VERSION                     7
+ #define BCM_5710_FW_MINOR_VERSION                     13
+-#define BCM_5710_FW_REVISION_VERSION          15
++#define BCM_5710_FW_REVISION_VERSION          21
++#define BCM_5710_FW_REVISION_VERSION_V15      15
+ #define BCM_5710_FW_ENGINEERING_VERSION               0
+ #define BCM_5710_FW_COMPILE_FLAGS                     1
+ 
+diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c 
b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+index aec666e976831..125dafe1db7ee 100644
+--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
++++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+@@ -74,9 +74,19 @@
+       __stringify(BCM_5710_FW_MINOR_VERSION) "."      \
+       __stringify(BCM_5710_FW_REVISION_VERSION) "."   \
+       __stringify(BCM_5710_FW_ENGINEERING_VERSION)
++
++#define FW_FILE_VERSION_V15                           \
++      __stringify(BCM_5710_FW_MAJOR_VERSION) "."      \
++      __stringify(BCM_5710_FW_MINOR_VERSION) "."      \
++      __stringify(BCM_5710_FW_REVISION_VERSION_V15) "."       \
++      __stringify(BCM_5710_FW_ENGINEERING_VERSION)
++
+ #define FW_FILE_NAME_E1               "bnx2x/bnx2x-e1-" FW_FILE_VERSION ".fw"
+ #define FW_FILE_NAME_E1H      "bnx2x/bnx2x-e1h-" FW_FILE_VERSION ".fw"
+ #define FW_FILE_NAME_E2               "bnx2x/bnx2x-e2-" FW_FILE_VERSION ".fw"
++#define FW_FILE_NAME_E1_V15   "bnx2x/bnx2x-e1-" FW_FILE_VERSION_V15 ".fw"
++#define FW_FILE_NAME_E1H_V15  "bnx2x/bnx2x-e1h-" FW_FILE_VERSION_V15 ".fw"
++#define FW_FILE_NAME_E2_V15   "bnx2x/bnx2x-e2-" FW_FILE_VERSION_V15 ".fw"
+ 
+ /* Time in jiffies before concluding the transmitter is hung */
+ #define TX_TIMEOUT            (5*HZ)
+@@ -747,9 +757,7 @@ static int bnx2x_mc_assert(struct bnx2x *bp)
+                 CHIP_IS_E1(bp) ? "everest1" :
+                 CHIP_IS_E1H(bp) ? "everest1h" :
+                 CHIP_IS_E2(bp) ? "everest2" : "everest3",
+-                BCM_5710_FW_MAJOR_VERSION,
+-                BCM_5710_FW_MINOR_VERSION,
+-                BCM_5710_FW_REVISION_VERSION);
++                bp->fw_major, bp->fw_minor, bp->fw_rev);
+ 
+       return rc;
+ }
+@@ -12308,6 +12316,15 @@ static int bnx2x_init_bp(struct bnx2x *bp)
+ 
+       bnx2x_read_fwinfo(bp);
+ 
++      if (IS_PF(bp)) {
++              rc = bnx2x_init_firmware(bp);
++
++              if (rc) {
++                      bnx2x_free_mem_bp(bp);
++                      return rc;
++              }
++      }
++
+       func = BP_FUNC(bp);
+ 
+       /* need to reset chip if undi was active */
+@@ -12320,6 +12337,7 @@ static int bnx2x_init_bp(struct bnx2x *bp)
+ 
+               rc = bnx2x_prev_unload(bp);
+               if (rc) {
++                      bnx2x_release_firmware(bp);
+                       bnx2x_free_mem_bp(bp);
+                       return rc;
+               }
+@@ -13317,16 +13335,11 @@ static int bnx2x_check_firmware(struct bnx2x *bp)
+       /* Check FW version */
+       offset = be32_to_cpu(fw_hdr->fw_version.offset);
+       fw_ver = firmware->data + offset;
+-      if ((fw_ver[0] != BCM_5710_FW_MAJOR_VERSION) ||
+-          (fw_ver[1] != BCM_5710_FW_MINOR_VERSION) ||
+-          (fw_ver[2] != BCM_5710_FW_REVISION_VERSION) ||
+-          (fw_ver[3] != BCM_5710_FW_ENGINEERING_VERSION)) {
++      if (fw_ver[0] != bp->fw_major || fw_ver[1] != bp->fw_minor ||
++          fw_ver[2] != bp->fw_rev || fw_ver[3] != bp->fw_eng) {
+               BNX2X_ERR("Bad FW version:%d.%d.%d.%d. Should be %d.%d.%d.%d\n",
+-                     fw_ver[0], fw_ver[1], fw_ver[2], fw_ver[3],
+-                     BCM_5710_FW_MAJOR_VERSION,
+-                     BCM_5710_FW_MINOR_VERSION,
+-                     BCM_5710_FW_REVISION_VERSION,
+-                     BCM_5710_FW_ENGINEERING_VERSION);
++                        fw_ver[0], fw_ver[1], fw_ver[2], fw_ver[3],
++                        bp->fw_major, bp->fw_minor, bp->fw_rev, bp->fw_eng);
+               return -EINVAL;
+       }
+ 
+@@ -13404,34 +13417,51 @@ do {                                                 
                \
+            (u8 *)bp->arr, len);                                       \
+ } while (0)
+ 
+-static int bnx2x_init_firmware(struct bnx2x *bp)
++int bnx2x_init_firmware(struct bnx2x *bp)
+ {
+-      const char *fw_file_name;
++      const char *fw_file_name, *fw_file_name_v15;
+       struct bnx2x_fw_file_hdr *fw_hdr;
+       int rc;
+ 
+       if (bp->firmware)
+               return 0;
+ 
+-      if (CHIP_IS_E1(bp))
++      if (CHIP_IS_E1(bp)) {
+               fw_file_name = FW_FILE_NAME_E1;
+-      else if (CHIP_IS_E1H(bp))
++              fw_file_name_v15 = FW_FILE_NAME_E1_V15;
++      } else if (CHIP_IS_E1H(bp)) {
+               fw_file_name = FW_FILE_NAME_E1H;
+-      else if (!CHIP_IS_E1x(bp))
++              fw_file_name_v15 = FW_FILE_NAME_E1H_V15;
++      } else if (!CHIP_IS_E1x(bp)) {
+               fw_file_name = FW_FILE_NAME_E2;
+-      else {
++              fw_file_name_v15 = FW_FILE_NAME_E2_V15;
++      } else {
+               BNX2X_ERR("Unsupported chip revision\n");
+               return -EINVAL;
+       }
++
+       BNX2X_DEV_INFO("Loading %s\n", fw_file_name);
+ 
+       rc = request_firmware(&bp->firmware, fw_file_name, &bp->pdev->dev);
+       if (rc) {
+-              BNX2X_ERR("Can't load firmware file %s\n",
+-                        fw_file_name);
+-              goto request_firmware_exit;
++              BNX2X_DEV_INFO("Trying to load older fw %s\n", 
fw_file_name_v15);
++
++              /* try to load prev version */
++              rc = request_firmware(&bp->firmware, fw_file_name_v15, 
&bp->pdev->dev);
++
++              if (rc)
++                      goto request_firmware_exit;
++
++              bp->fw_rev = BCM_5710_FW_REVISION_VERSION_V15;
++      } else {
++              bp->fw_cap |= FW_CAP_INVALIDATE_VF_FP_HSI;
++              bp->fw_rev = BCM_5710_FW_REVISION_VERSION;
+       }
+ 
++      bp->fw_major = BCM_5710_FW_MAJOR_VERSION;
++      bp->fw_minor = BCM_5710_FW_MINOR_VERSION;
++      bp->fw_eng = BCM_5710_FW_ENGINEERING_VERSION;
++
+       rc = bnx2x_check_firmware(bp);
+       if (rc) {
+               BNX2X_ERR("Corrupt firmware file %s\n", fw_file_name);
+@@ -13487,7 +13517,7 @@ request_firmware_exit:
+       return rc;
+ }
+ 
+-static void bnx2x_release_firmware(struct bnx2x *bp)
++void bnx2x_release_firmware(struct bnx2x *bp)
+ {
+       kfree(bp->init_ops_offsets);
+       kfree(bp->init_ops);
+@@ -14004,6 +14034,7 @@ static int bnx2x_init_one(struct pci_dev *pdev,
+       return 0;
+ 
+ init_one_freemem:
++      bnx2x_release_firmware(bp);
+       bnx2x_free_mem_bp(bp);
+ 
+ init_one_exit:
+diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c 
b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
+index 74a8931ce1d1d..11d15cd036005 100644
+--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
++++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
+@@ -758,9 +758,18 @@ static void bnx2x_vf_igu_reset(struct bnx2x *bp, struct 
bnx2x_virtf *vf)
+ 
+ void bnx2x_vf_enable_access(struct bnx2x *bp, u8 abs_vfid)
+ {
++      u16 abs_fid;
++
++      abs_fid = FW_VF_HANDLE(abs_vfid);
++
+       /* set the VF-PF association in the FW */
+-      storm_memset_vf_to_pf(bp, FW_VF_HANDLE(abs_vfid), BP_FUNC(bp));
+-      storm_memset_func_en(bp, FW_VF_HANDLE(abs_vfid), 1);
++      storm_memset_vf_to_pf(bp, abs_fid, BP_FUNC(bp));
++      storm_memset_func_en(bp, abs_fid, 1);
++
++      /* Invalidate fp_hsi version for vfs */
++      if (bp->fw_cap & FW_CAP_INVALIDATE_VF_FP_HSI)
++              REG_WR8(bp, BAR_XSTRORM_INTMEM +
++                          
XSTORM_ETH_FUNCTION_INFO_FP_HSI_VALID_E2_OFFSET(abs_fid), 0);
+ 
+       /* clear vf errors*/
+       bnx2x_vf_semi_clear_err(bp, abs_vfid);
+diff --git a/fs/io_uring.c b/fs/io_uring.c
+index e0fbb940fe5c3..15f303180d70c 100644
+--- a/fs/io_uring.c
++++ b/fs/io_uring.c
+@@ -1830,6 +1830,18 @@ static inline void io_get_task_refs(int nr)
+               io_task_refs_refill(tctx);
+ }
+ 
++static __cold void io_uring_drop_tctx_refs(struct task_struct *task)
++{
++      struct io_uring_task *tctx = task->io_uring;
++      unsigned int refs = tctx->cached_refs;
++
++      if (refs) {
++              tctx->cached_refs = 0;
++              percpu_counter_sub(&tctx->inflight, refs);
++              put_task_struct_many(task, refs);
++      }
++}
++
+ static bool io_cqring_event_overflow(struct io_ring_ctx *ctx, u64 user_data,
+                                    s32 res, u32 cflags)
+ {
+@@ -2250,6 +2262,10 @@ static void tctx_task_work(struct callback_head *cb)
+       }
+ 
+       ctx_flush_and_put(ctx, &locked);
++
++      /* relaxed read is enough as only the task itself sets ->in_idle */
++      if (unlikely(atomic_read(&tctx->in_idle)))
++              io_uring_drop_tctx_refs(current);
+ }
+ 
+ static void io_req_task_work_add(struct io_kiocb *req)
+@@ -9818,18 +9834,6 @@ static s64 tctx_inflight(struct io_uring_task *tctx, 
bool tracked)
+       return percpu_counter_sum(&tctx->inflight);
+ }
+ 
+-static __cold void io_uring_drop_tctx_refs(struct task_struct *task)
+-{
+-      struct io_uring_task *tctx = task->io_uring;
+-      unsigned int refs = tctx->cached_refs;
+-
+-      if (refs) {
+-              tctx->cached_refs = 0;
+-              percpu_counter_sub(&tctx->inflight, refs);
+-              put_task_struct_many(task, refs);
+-      }
+-}
+-
+ /*
+  * Find any io_uring ctx that this task has registered or done IO on, and 
cancel
+  * requests. @sqd should be not-null IFF it's an SQPOLL thread cancellation.
+@@ -9887,10 +9891,14 @@ static __cold void io_uring_cancel_generic(bool 
cancel_all,
+                       schedule();
+               finish_wait(&tctx->wait, &wait);
+       } while (1);
+-      atomic_dec(&tctx->in_idle);
+ 
+       io_uring_clean_tctx(tctx);
+       if (cancel_all) {
++              /*
++               * We shouldn't run task_works after cancel, so just leave
++               * ->in_idle set for normal exit.
++               */
++              atomic_dec(&tctx->in_idle);
+               /* for exec all current's requests should be gone, kill tctx */
+               __io_uring_free(current);
+       }
+diff --git a/fs/select.c b/fs/select.c
+index 945896d0ac9e7..5edffee1162c2 100644
+--- a/fs/select.c
++++ b/fs/select.c
+@@ -458,9 +458,11 @@ get_max:
+       return max;
+ }
+ 
+-#define POLLIN_SET (EPOLLRDNORM | EPOLLRDBAND | EPOLLIN | EPOLLHUP | EPOLLERR)
+-#define POLLOUT_SET (EPOLLWRBAND | EPOLLWRNORM | EPOLLOUT | EPOLLERR)
+-#define POLLEX_SET (EPOLLPRI)
++#define POLLIN_SET (EPOLLRDNORM | EPOLLRDBAND | EPOLLIN | EPOLLHUP | EPOLLERR 
|\
++                      EPOLLNVAL)
++#define POLLOUT_SET (EPOLLWRBAND | EPOLLWRNORM | EPOLLOUT | EPOLLERR |\
++                       EPOLLNVAL)
++#define POLLEX_SET (EPOLLPRI | EPOLLNVAL)
+ 
+ static inline void wait_key_set(poll_table *wait, unsigned long in,
+                               unsigned long out, unsigned long bit,
+@@ -527,6 +529,7 @@ static int do_select(int n, fd_set_bits *fds, struct 
timespec64 *end_time)
+                                       break;
+                               if (!(bit & all_bits))
+                                       continue;
++                              mask = EPOLLNVAL;
+                               f = fdget(i);
+                               if (f.file) {
+                                       wait_key_set(wait, in, out, bit,
+@@ -534,34 +537,34 @@ static int do_select(int n, fd_set_bits *fds, struct 
timespec64 *end_time)
+                                       mask = vfs_poll(f.file, wait);
+ 
+                                       fdput(f);
+-                                      if ((mask & POLLIN_SET) && (in & bit)) {
+-                                              res_in |= bit;
+-                                              retval++;
+-                                              wait->_qproc = NULL;
+-                                      }
+-                                      if ((mask & POLLOUT_SET) && (out & 
bit)) {
+-                                              res_out |= bit;
+-                                              retval++;
+-                                              wait->_qproc = NULL;
+-                                      }
+-                                      if ((mask & POLLEX_SET) && (ex & bit)) {
+-                                              res_ex |= bit;
+-                                              retval++;
+-                                              wait->_qproc = NULL;
+-                                      }
+-                                      /* got something, stop busy polling */
+-                                      if (retval) {
+-                                              can_busy_loop = false;
+-                                              busy_flag = 0;
+-
+-                                      /*
+-                                       * only remember a returned
+-                                       * POLL_BUSY_LOOP if we asked for it
+-                                       */
+-                                      } else if (busy_flag & mask)
+-                                              can_busy_loop = true;
+-
+                               }
++                              if ((mask & POLLIN_SET) && (in & bit)) {
++                                      res_in |= bit;
++                                      retval++;
++                                      wait->_qproc = NULL;
++                              }
++                              if ((mask & POLLOUT_SET) && (out & bit)) {
++                                      res_out |= bit;
++                                      retval++;
++                                      wait->_qproc = NULL;
++                              }
++                              if ((mask & POLLEX_SET) && (ex & bit)) {
++                                      res_ex |= bit;
++                                      retval++;
++                                      wait->_qproc = NULL;
++                              }
++                              /* got something, stop busy polling */
++                              if (retval) {
++                                      can_busy_loop = false;
++                                      busy_flag = 0;
++
++                              /*
++                               * only remember a returned
++                               * POLL_BUSY_LOOP if we asked for it
++                               */
++                              } else if (busy_flag & mask)
++                                      can_busy_loop = true;
++
+                       }
+                       if (res_in)
+                               *rinp = res_in;
+diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
+index 906b6887622d3..28fd0cef9b1fb 100644
+--- a/kernel/rcu/tree.c
++++ b/kernel/rcu/tree.c
+@@ -1590,10 +1590,11 @@ static void __maybe_unused 
rcu_advance_cbs_nowake(struct rcu_node *rnp,
+                                                 struct rcu_data *rdp)
+ {
+       rcu_lockdep_assert_cblist_protected(rdp);
+-      if (!rcu_seq_state(rcu_seq_current(&rnp->gp_seq)) ||
+-          !raw_spin_trylock_rcu_node(rnp))
++      if (!rcu_seq_state(rcu_seq_current(&rnp->gp_seq)) || 
!raw_spin_trylock_rcu_node(rnp))
+               return;
+-      WARN_ON_ONCE(rcu_advance_cbs(rnp, rdp));
++      // The grace period cannot end while we hold the rcu_node lock.
++      if (rcu_seq_state(rcu_seq_current(&rnp->gp_seq)))
++              WARN_ON_ONCE(rcu_advance_cbs(rnp, rdp));
+       raw_spin_unlock_rcu_node(rnp);
+ }
+ 
+diff --git a/mm/memcontrol.c b/mm/memcontrol.c
+index 2ed5f2a0879d3..fdc952f270c14 100644
+--- a/mm/memcontrol.c
++++ b/mm/memcontrol.c
+@@ -629,11 +629,17 @@ static DEFINE_SPINLOCK(stats_flush_lock);
+ static DEFINE_PER_CPU(unsigned int, stats_updates);
+ static atomic_t stats_flush_threshold = ATOMIC_INIT(0);
+ 
+-static inline void memcg_rstat_updated(struct mem_cgroup *memcg)
++static inline void memcg_rstat_updated(struct mem_cgroup *memcg, int val)
+ {
++      unsigned int x;
++
+       cgroup_rstat_updated(memcg->css.cgroup, smp_processor_id());
+-      if (!(__this_cpu_inc_return(stats_updates) % MEMCG_CHARGE_BATCH))
+-              atomic_inc(&stats_flush_threshold);
++
++      x = __this_cpu_add_return(stats_updates, abs(val));
++      if (x > MEMCG_CHARGE_BATCH) {
++              atomic_add(x / MEMCG_CHARGE_BATCH, &stats_flush_threshold);
++              __this_cpu_write(stats_updates, 0);
++      }
+ }
+ 
+ static void __mem_cgroup_flush_stats(void)
+@@ -656,7 +662,7 @@ void mem_cgroup_flush_stats(void)
+ 
+ static void flush_memcg_stats_dwork(struct work_struct *w)
+ {
+-      mem_cgroup_flush_stats();
++      __mem_cgroup_flush_stats();
+       queue_delayed_work(system_unbound_wq, &stats_flush_dwork, 2UL*HZ);
+ }
+ 
+@@ -672,7 +678,7 @@ void __mod_memcg_state(struct mem_cgroup *memcg, int idx, 
int val)
+               return;
+ 
+       __this_cpu_add(memcg->vmstats_percpu->state[idx], val);
+-      memcg_rstat_updated(memcg);
++      memcg_rstat_updated(memcg, val);
+ }
+ 
+ /* idx can be of type enum memcg_stat_item or node_stat_item. */
+@@ -705,7 +711,7 @@ void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum 
node_stat_item idx,
+       /* Update lruvec */
+       __this_cpu_add(pn->lruvec_stats_percpu->state[idx], val);
+ 
+-      memcg_rstat_updated(memcg);
++      memcg_rstat_updated(memcg, val);
+ }
+ 
+ /**
+@@ -789,7 +795,7 @@ void __count_memcg_events(struct mem_cgroup *memcg, enum 
vm_event_item idx,
+               return;
+ 
+       __this_cpu_add(memcg->vmstats_percpu->events[idx], count);
+-      memcg_rstat_updated(memcg);
++      memcg_rstat_updated(memcg, count);
+ }
+ 
+ static unsigned long memcg_events(struct mem_cgroup *memcg, int event)

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