On 2024/4/11 1:28, Alexandre Ghiti wrote:
On 10/04/2024 10:07, Kefeng Wang wrote:
On 2024/4/10 15:32, Alexandre Ghiti wrote:
Hi Kefeng,
On 03/04/2024 10:38, Kefeng Wang wrote:
The access_error() of vma already checked under per-VMA lock, if it
is a bad access, directly handle error
On 2024/4/10 15:32, Alexandre Ghiti wrote:
Hi Kefeng,
On 03/04/2024 10:38, Kefeng Wang wrote:
The access_error() of vma already checked under per-VMA lock, if it
is a bad access, directly handle error, no need to retry with mmap_lock
again. Since the page faut is handled under per-VMA lock
On 2024/4/4 4:45, Andrew Morton wrote:
On Wed, 3 Apr 2024 16:37:58 +0800 Kefeng Wang
wrote:
After VMA lock-based page fault handling enabled, if bad access met
under per-vma lock, it will fallback to mmap_lock-based handling,
so it leads to unnessary mmap lock and vma find again. A test
the page faut is handled under per-VMA lock, count it
as a vma lock event with VMA_LOCK_SUCCESS.
Reviewed-by: Suren Baghdasaryan
Signed-off-by: Kefeng Wang
---
arch/x86/mm/fault.c | 23 ++-
1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/arch/x86/mm/fault.c b/arch
-by: Kefeng Wang
---
arch/riscv/mm/fault.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c
index 3ba1d4dde5dd..b3fcf7d67efb 100644
--- a/arch/riscv/mm/fault.c
+++ b/arch/riscv/mm/fault.c
@@ -292,7 +292,10 @@ void handle_page_fault
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly handle error, no need to retry with mmap_lock
again. Since the page faut is handled under per-VMA lock, count it
as a vma lock event with VMA_LOCK_SUCCESS.
Signed-off-by: Kefeng Wang
---
arch/s390/mm/fault.c
-by: Suren Baghdasaryan
Signed-off-by: Kefeng Wang
---
arch/arm/mm/fault.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 439dc6a26bb9..5c4b417e24f9 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -294,7 +294,9
mmap_lock. Since the page faut is handled under per-VMA lock,
count it as a vma lock event with VMA_LOCK_SUCCESS.
Signed-off-by: Kefeng Wang
---
arch/powerpc/mm/fault.c | 33 -
1 file changed, 20 insertions(+), 13 deletions(-)
diff --git a/arch/powerpc/mm/fault.c b/arch
-> 0.19198
Only build test on other archs except arm64.
v2:
- a better changelog, and describe the counting changes, suggested by
Suren Baghdasaryan
- add RB
Kefeng Wang (7):
arm64: mm: cleanup __do_page_fault()
arm64: mm: accelerate pagefault when VM_FAULT_BADACCESS
arm: mm: acceler
per-VMA lock, count it as a vma lock
event with VMA_LOCK_SUCCESS.
Reviewed-by: Suren Baghdasaryan
Signed-off-by: Kefeng Wang
---
arch/arm64/mm/fault.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 9bb9f395351a
The __do_page_fault() only calls handle_mm_fault() after vm_flags
checked, and it is only called by do_page_fault(), let's squash
it into do_page_fault() to cleanup code.
Reviewed-by: Suren Baghdasaryan
Signed-off-by: Kefeng Wang
---
arch/arm64/mm/fault.c | 27 +++
1
On 2024/4/3 13:59, Suren Baghdasaryan wrote:
On Tue, Apr 2, 2024 at 12:53 AM Kefeng Wang wrote:
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly handle error and return, there is no need to
lock_mm_and_find_vma() and check vm_flags again.
Signed-off
On 2024/4/3 13:30, Suren Baghdasaryan wrote:
On Tue, Apr 2, 2024 at 10:19 PM Suren Baghdasaryan wrote:
On Tue, Apr 2, 2024 at 12:53 AM Kefeng Wang wrote:
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly set fault to VM_FAULT_BADACCESS and handle
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly handle error and return, there is no need to
lock_mm_and_find_vma() and check vm_flags again.
Signed-off-by: Kefeng Wang
---
arch/x86/mm/fault.c | 23 ++-
1 file changed, 14 insertions
The __do_page_fault() only check vma->flags and call handle_mm_fault(),
and only called by do_page_fault(), let's squash it into do_page_fault()
to cleanup code.
Signed-off-by: Kefeng Wang
---
arch/arm64/mm/fault.c | 27 +++
1 file changed, 7 insertions(+), 20 deleti
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly handle error and return, there is no need to
lock_mm_and_find_vma() and check vm_flags again.
Signed-off-by: Kefeng Wang
---
arch/s390/mm/fault.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff
-> 0.19198
Only build test on other archs except arm64.
Kefeng Wang (7):
arm64: mm: cleanup __do_page_fault()
arm64: mm: accelerate pagefault when VM_FAULT_BADACCESS
arm: mm: accelerate pagefault when VM_FAULT_BADACCESS
powerpc: mm: accelerate pagefault when badaccess
riscv: mm: acceler
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly handle error and return, there is no need to
lock_mm_and_find_vma() and check vm_flags again.
Signed-off-by: Kefeng Wang
---
arch/riscv/mm/fault.c | 5 -
1 file changed, 4 insertions(+), 1 deletion
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly handle error and return, there is no need to
lock_mm_and_find_vma() and check vm_flags again.
Signed-off-by: Kefeng Wang
---
arch/powerpc/mm/fault.c | 33 -
1 file changed, 20
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly set fault to VM_FAULT_BADACCESS and handle error,
so no need to lock_mm_and_find_vma() and check vm_flags again.
Signed-off-by: Kefeng Wang
---
arch/arm/mm/fault.c | 4 +++-
1 file changed, 3 insertions
The vm_flags of vma already checked under per-VMA lock, if it is a
bad access, directly set fault to VM_FAULT_BADACCESS and handle error,
no need to lock_mm_and_find_vma() and check vm_flags again, the latency
time reduce 34% in lmbench 'lat_sig -P 1 prot lat_sig'.
Signed-off-by: Kefeng Wang
On 2023/11/20 14:40, Arnd Bergmann wrote:
On Mon, Nov 20, 2023, at 01:39, Kefeng Wang wrote:
On 2023/11/20 3:34, Geert Uytterhoeven wrote:
On Sat, Nov 18, 2023 at 11:09 AM Kefeng Wang wrote:
-/*
- * Convert a physical pointer to a virtual kernel pointer for /dev/mem
- * access
David S. Miller"
Cc: Stanislav Kinsburskii
Reviewed-by: Geert Uytterhoeven [m68k]
Acked-by: Geert Uytterhoeven [m68k]
Reviewed-by: Geert Uytterhoeven[sh]
Signed-off-by: Kefeng Wang
---
v2:
- remove mips change, since it needs more extra works for enable
arch/al
On 2023/11/20 3:34, Geert Uytterhoeven wrote:
On Sat, Nov 18, 2023 at 11:09 AM Kefeng Wang wrote:
The asm-generic/io.h already has default definition, remove unnecessary
arch's defination.
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Russell King
Cc: Brian Cain
Cc: "Jame
David S. Miller"
Cc: Stanislav Kinsburskii
Signed-off-by: Kefeng Wang
---
arch/alpha/include/asm/io.h| 6 --
arch/arm/include/asm/io.h | 6 --
arch/hexagon/include/asm/io.h | 6 --
arch/m68k/include/asm/io_mm.h | 6 --
arch/mips/include/asm/io.h | 7 ---
On 2023/8/24 16:32, Heiko Carstens wrote:
On Thu, Aug 24, 2023 at 10:16:33AM +0200, Alexander Gordeev wrote:
On Mon, Aug 21, 2023 at 08:30:50PM +0800, Kefeng Wang wrote:
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
On 2023/8/24 15:12, Alexander Gordeev wrote:
On Mon, Aug 21, 2023 at 08:30:47PM +0800, Kefeng Wang wrote:
Hi Kefeng,
The ARCH_SUPPORTS_PER_VMA_LOCK are enabled by more and more architectures,
eg, x86, arm64, powerpc and s390, and riscv, those implementation are very
similar which results
On 2023/8/22 17:38, Christophe Leroy wrote:
Le 21/08/2023 à 14:30, Kefeng Wang a écrit :
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Does it really simplifies code ? It's 32 insertions versus 34 deletions
so only removing 2 lines.
Yes
Use new try_vma_locked_page_fault() helper to simplify code, also
pass struct vmf to __do_page_fault() directly instead of each
independent variable. No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/arm64/mm/fault.c | 60 ---
1 file
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/s390/mm/fault.c | 66 ++--
1 file changed, 27 insertions(+), 39 deletions(-)
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/x86/mm/fault.c | 55 +++--
1 file changed, 23 insertions(+), 32 deletions(-)
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm
Attempt VMA lock-based page fault handling first, and fall back
to the existing mmap_lock-based handling if that fails.
Signed-off-by: Kefeng Wang
---
arch/arm/Kconfig| 1 +
arch/arm/mm/fault.c | 35 +--
2 files changed, 26 insertions(+), 10 deletions
Cleanup __do_page_fault() by reuse bad_area_nosemaphore and
bad_area label.
Signed-off-by: Kefeng Wang
---
arch/loongarch/mm/fault.c | 48 +--
1 file changed, 16 insertions(+), 32 deletions(-)
diff --git a/arch/loongarch/mm/fault.c b/arch/loongarch/mm
Add access_error() to check whether vma could be accessible or not,
which will be used __do_page_fault() and later vma locked based page
fault.
Signed-off-by: Kefeng Wang
---
arch/loongarch/mm/fault.c | 30 --
1 file changed, 20 insertions(+), 10 deletions(-)
diff
headfile.
- re-use struct vm_fault instead of adding new struct vm_locked_fault,
per Matthew Wilcox, add necessary pt_regs/fault error code/vm flags
into vm_fault since they could be used in arch_vma_access_error()
- add special VM_FAULT_NONE and make try_vma_locked_page_fault() to
return vm_
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/powerpc/mm/fault.c | 66 -
1 file changed, 32 insertions(+), 34 deletions(-)
diff --git a/arch/powerpc/mm/fault.c b/arch
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/riscv/mm/fault.c | 58 ++-
1 file changed, 24 insertions(+), 34 deletions(-)
diff --git a/arch/riscv/mm/fault.c b/arch/riscv
-use struct vm_fault to record and check vma accessable by each
own implementation.
Signed-off-by: Kefeng Wang
---
include/linux/mm.h | 17 +
include/linux/mm_types.h | 2 ++
mm/memory.c | 39 +++
3 files changed, 58
Attempt VMA lock-based page fault handling first, and fall back
to the existing mmap_lock-based handling if that fails.
Signed-off-by: Kefeng Wang
---
arch/loongarch/Kconfig| 1 +
arch/loongarch/mm/fault.c | 37 +++--
2 files changed, 32 insertions(+), 6
On 2023/7/14 9:52, Kefeng Wang wrote:
On 2023/7/14 4:12, Suren Baghdasaryan wrote:
On Thu, Jul 13, 2023 at 9:15 AM Matthew Wilcox
wrote:
+int try_vma_locked_page_fault(struct vm_locked_fault *vmlf,
vm_fault_t *ret)
+{
+ struct vm_area_struct *vma;
+ vm_fault_t fault;
On Thu
On 2023/7/14 4:12, Suren Baghdasaryan wrote:
On Thu, Jul 13, 2023 at 9:15 AM Matthew Wilcox wrote:
+int try_vma_locked_page_fault(struct vm_locked_fault *vmlf, vm_fault_t *ret)
+{
+ struct vm_area_struct *vma;
+ vm_fault_t fault;
On Thu, Jul 13, 2023 at 05:53:29PM +0800, Kefeng
Please ignore this one...
On 2023/7/13 17:51, Kefeng Wang wrote:
Add a generic VMA lock-based page fault handler in mm core, and convert
architectures to use it, which eliminate architectures's duplicated codes.
With it, we can avoid multiple changes in architectures's code if we
add new
Attempt VMA lock-based page fault handling first, and fall back
to the existing mmap_lock-based handling if that fails.
Signed-off-by: Kefeng Wang
---
arch/arm/Kconfig| 1 +
arch/arm/mm/fault.c | 15 ++-
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/arch/arm
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/s390/mm/fault.c | 23 ++-
1 file changed, 6 insertions(+), 17 deletions(-)
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/arm64/mm/fault.c | 28 +---
1 file changed, 5 insertions(+), 23 deletions(-)
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index
to support this feature on new architectures.
Signed-off-by: Kefeng Wang
---
include/linux/mm.h | 28
mm/memory.c| 42 ++
2 files changed, 70 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index
38b3aec8e8d2 "mm: drop per-VMA
lock when returning VM_FAULT_RETRY or VM_FAULT_COMPLETED", and in the end,
we enable this feature on ARM32/Loongarch too.
This is based on next-20230713, only built test(no loongarch compiler,
so except loongarch).
Kefeng Wang (10):
mm: add a generic VMA lock-
Attempt VMA lock-based page fault handling first, and fall back
to the existing mmap_lock-based handling if that fails.
Signed-off-by: Kefeng Wang
---
arch/loongarch/Kconfig| 1 +
arch/loongarch/mm/fault.c | 26 ++
2 files changed, 27 insertions(+)
diff --git
Add access_error() to check whether vma could be accessible or not,
which will be used __do_page_fault() and later vma locked based page
fault.
Signed-off-by: Kefeng Wang
---
arch/loongarch/mm/fault.c | 30 --
1 file changed, 20 insertions(+), 10 deletions(-)
diff
Cleanup __do_page_fault() by reuse bad_area_nosemaphore and
bad_area label.
Signed-off-by: Kefeng Wang
---
arch/loongarch/mm/fault.c | 36 +++-
1 file changed, 11 insertions(+), 25 deletions(-)
diff --git a/arch/loongarch/mm/fault.c b/arch/loongarch/mm/fault.c
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/powerpc/mm/fault.c | 54 +
1 file changed, 22 insertions(+), 32 deletions(-)
diff --git a/arch/powerpc/mm/fault.c b/arch
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/riscv/mm/fault.c | 38 +++---
1 file changed, 15 insertions(+), 23 deletions(-)
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm
Use new try_vma_locked_page_fault() helper to simplify code.
No functional change intended.
Signed-off-by: Kefeng Wang
---
arch/x86/mm/fault.c | 39 +++
1 file changed, 15 insertions(+), 24 deletions(-)
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
38b3aec8e8d2 "mm: drop per-VMA
lock when returning VM_FAULT_RETRY or VM_FAULT_COMPLETED", and in the end,
we enable this feature on ARM32/Loongarch too.
This is based on next-20230713, only built test(no loongarch compiler,
so except loongarch).
Kefeng Wang (10):
mm: add a generic VMA lock-
All callers of show_mem() pass 0 and NULL, so we can remove the two
arguments by directly calling __show_mem(0, NULL, MAX_NR_ZONES - 1)
in show_mem().
Signed-off-by: Kefeng Wang
---
v2: update commit log
arch/powerpc/xmon/xmon.c | 2 +-
drivers/tty/sysrq.c | 2 +-
drivers/tty/vt
All callers of show_free_areas() pass 0 and NULL, so we can directly
use show_mem() instead of show_free_areas(0, NULL), which could make
show_free_areas() a static function.
Signed-off-by: Kefeng Wang
---
v2: update commit log and fix a missing show_free_areas() conversion
arch/sparc/kernel
Thanks,
On 2023/6/29 23:00, kernel test robot wrote:
Hi Kefeng,
kernel test robot noticed the following build errors:
[auto build test ERROR on akpm-mm/mm-everything]
url:
https://github.com/intel-lab-lkp/linux/commits/Kefeng-Wang/mm-make-show_free_areas-static/20230629-182958
base
On 2023/6/29 23:17, Matthew Wilcox wrote:
On Thu, Jun 29, 2023 at 06:43:56PM +0800, Kefeng Wang wrote:
Directly call __show_mem(0, NULL, MAX_NR_ZONES - 1) in show_mem()
to remove the arguments of show_mem().
Do you mean, "All callers of show_mem() pass 0 and NULL, so we can
remove th
Directly call __show_mem(0, NULL, MAX_NR_ZONES - 1) in show_mem()
to remove the arguments of show_mem().
Signed-off-by: Kefeng Wang
---
arch/powerpc/xmon/xmon.c | 2 +-
drivers/tty/sysrq.c | 2 +-
drivers/tty/vt/keyboard.c | 2 +-
include/linux/mm.h| 4 ++--
init/initramfs.c
Directly use show_mem() instead of show_free_areas(0, NULL), then
make show_free_areas() a static function.
Signed-off-by: Kefeng Wang
---
arch/sparc/kernel/setup_32.c | 2 +-
include/linux/mm.h | 12
mm/internal.h| 6 ++
mm/nommu.c
an
Signed-off-by: Mike Rapoport (IBM)
Reviewed-by: Kefeng Wang
---
arch/arm64/Kconfig | 24
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7324032af859..cc11cdcf5a00 100644
--- a/arch/arm64/Kconfig
plications of changing MAX_ORDER before actually amending it and
ranges don't help here.
Drop ranges in definition of ARCH_FORCE_MAX_ORDER and make its prompt
visible only if EXPERT=y
Acked-by: Kirill A. Shutemov
Reviewed-by: Zi Yan
Signed-off-by: Mike Rapoport (IBM)
Reviewed-by: Kefeng Wang
---
On 2023/3/25 14:08, Mike Rapoport wrote:
From: "Mike Rapoport (IBM)"
It is enough to keep default values for base and huge pages without
letting users to override ARCH_FORCE_MAX_ORDER.
Drop the prompt to make the option unvisible in *config.
Acked-by: Kirill A. Shutemov
Reviewed-by: Zi
() completely.
Signed-off-by: Kefeng Wang
---
arch/alpha/include/asm/pgtable.h | 2 -
arch/arc/include/asm/pgtable-bits-arcv2.h | 2 -
arch/arm/include/asm/pgtable-nommu.h | 2 -
arch/arm/include/asm/pgtable.h| 4 --
arch/arm64/include/asm/pgtable.h | 2 -
arch
The is_kernel_inittext() and init_kernel_text() are with same
functionality, let's just keep is_kernel_inittext() and move
it into sections.h, then update all the callers.
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Arnd Bergmann
Cc: x...@kernel.org
Signed-off-by: Kefeng Wang
---
arch/x86/kernel
Use is_kernel_text() helper to simplify code.
Cc: Michal Simek
Signed-off-by: Kefeng Wang
---
arch/microblaze/mm/pgtable.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/microblaze/mm/pgtable.c b/arch/microblaze/mm/pgtable.c
index c1833b159d3b..9f73265aad4e 100644
Directly use is_kernel() helper in kernel_or_module_addr().
Cc: Andrey Ryabinin
Cc: Alexander Potapenko
Cc: Andrey Konovalov
Cc: Dmitry Vyukov
Signed-off-by: Kefeng Wang
---
mm/kasan/report.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/kasan/report.c b/mm/kasan
After commit 4ba66a976072 ("arch: remove blackfin port"),
no need arch-specific text/data check.
Cc: Arnd Bergmann
Signed-off-by: Kefeng Wang
---
include/asm-generic/sections.h | 16
include/linux/kallsyms.h | 3 +--
kernel/locking/lockdep.c | 3 --
ng for x86 special
check.
Cc: Ingo Molnar
Cc: Borislav Petkov
Cc: x...@kernel.org
Signed-off-by: Kefeng Wang
---
arch/x86/mm/init_32.c | 14 +-
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index bd90b8fe81e4..523743ee9
-by: Steven Rostedt (VMware)
Acked-by: Sergey Senozhatsky
Signed-off-by: Kefeng Wang
---
include/linux/kallsyms.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index 2a241e3f063f..b016c62f30a6 100644
--- a/include/linux
The core_kernel_text() should check the gate area, as it is part
of kernel text range, use is_kernel_text() in core_kernel_text().
Cc: Steven Rostedt
Signed-off-by: Kefeng Wang
---
kernel/extable.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/kernel/extable.c b/kernel
Use is_kernel_text() helper to simplify code.
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Signed-off-by: Kefeng Wang
---
arch/alpha/kernel/traps.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c
index
Use core_kernel_text() helper to simplify code, also drop etext,
_stext, _sinittext, _einittext declaration which already declared
in section.h.
Cc: Michael Ellerman
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Christophe Leroy
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Kefeng Wang
An internal __is_kernel() helper which only check the
kernel address ranges, and an internal __is_kernel_text()
helper which only check text section ranges.
Signed-off-by: Kefeng Wang
---
include/asm-generic/sections.h | 29 +
include/linux/kallsyms.h | 4
Move core_kernel_data() into sections.h and rename it to
is_kernel_core_data(), also make it return bool value, then
update all the callers.
Cc: Arnd Bergmann
Cc: Steven Rostedt
Cc: Ingo Molnar
Cc: "David S. Miller"
Signed-off-by: Kefeng Wang
---
include/asm-generic/secti
Kefeng Wang (11):
kallsyms: Remove arch specific text and data check
kallsyms: Fix address-checks for kernel related range
sections: Move and rename core_kernel_data() to is_kernel_core_data()
sections: Move is_kernel_inittext() into sections.h
x86: mm: Rename __is_kernel_text
On 2021/9/29 1:51, Christophe Leroy wrote:
Le 26/09/2021 à 09:20, Kefeng Wang a écrit :
Use is_kernel_text() and is_kernel_inittext() helper to simplify code,
also drop etext, _stext, _sinittext, _einittext declaration which
already declared in section.h.
Cc: Michael Ellerman
Cc
The is_kernel_inittext() and init_kernel_text() are with same
functionality, let's just keep is_kernel_inittext() and move
it into sections.h, then update all the callers.
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Arnd Bergmann
Cc: x...@kernel.org
Signed-off-by: Kefeng Wang
---
arch/x86/kernel
Move core_kernel_data() into sections.h and rename it to
is_kernel_core_data(), also make it return bool value, then
update all the callers.
Cc: Arnd Bergmann
Cc: Steven Rostedt
Cc: Ingo Molnar
Cc: "David S. Miller"
Signed-off-by: Kefeng Wang
---
include/asm-generic/secti
An internal __is_kernel() helper which only check the kernel address ranges,
and an internal __is_kernel_text() helper which only check text section ranges.
Signed-off-by: Kefeng Wang
---
include/asm-generic/sections.h | 29 +
include/linux/kallsyms.h | 4
Use is_kernel_text() and is_kernel_inittext() helper to simplify code,
also drop etext, _stext, _sinittext, _einittext declaration which
already declared in section.h.
Cc: Michael Ellerman
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Kefeng
The core_kernel_text() should check the gate area, as it is part
of kernel text range.
Cc: Steven Rostedt
Signed-off-by: Kefeng Wang
---
kernel/extable.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/kernel/extable.c b/kernel/extable.c
index 98ca627ac5ef..0ba383d850ff
Directly use is_kernel() helper in kernel_or_module_addr().
Cc: Andrey Ryabinin
Cc: Alexander Potapenko
Cc: Andrey Konovalov
Cc: Dmitry Vyukov
Signed-off-by: Kefeng Wang
---
mm/kasan/report.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/kasan/report.c b/mm/kasan
/20210626073439.150586-1-wangkefeng.w...@huawei.com
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-a...@vger.kernel.org
Cc: b...@vger.kernel.org
Kefeng Wang (9):
kallsyms: Remove arch specific text and data check
kallsyms: Fix address-checks for kernel related range
sections: Move and rename
-by: Steven Rostedt (VMware)
Acked-by: Sergey Senozhatsky
Signed-off-by: Kefeng Wang
---
include/linux/kallsyms.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index 2a241e3f063f..b016c62f30a6 100644
--- a/include/linux
After commit 4ba66a976072 ("arch: remove blackfin port"),
no need arch-specific text/data check.
Cc: Arnd Bergmann
Signed-off-by: Kefeng Wang
---
include/asm-generic/sections.h | 16
include/linux/kallsyms.h | 3 +--
kernel/locking/lockdep.c | 3 --
ng for x86 special
check.
Cc: Ingo Molnar
Cc: Borislav Petkov
Cc: x...@kernel.org
Signed-off-by: Kefeng Wang
---
arch/x86/mm/init_32.c | 14 +-
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index bd90b8fe81e4..523743ee9
: Michael Ellerman
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Paul Walmsley
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Anton Ivanov
Cc: Andrew Morton
Signed-off-by: Kefeng Wang
---
arch/arc/kernel/traps.c | 5 -
arch/arm/kernel/traps.c | 5 -
arch/h8300/kernel/traps.c
On 2021/7/29 12:05, Steven Rostedt wrote:
On Thu, 29 Jul 2021 10:00:51 +0800
Kefeng Wang wrote:
On 2021/7/28 23:28, Steven Rostedt wrote:
On Wed, 28 Jul 2021 16:13:18 +0800
Kefeng Wang wrote:
The is_kernel[_text]() function check the address whether or not
in kernel[_text] ranges
On 2021/7/28 22:46, Steven Rostedt wrote:
On Wed, 28 Jul 2021 16:13:15 +0800
Kefeng Wang wrote:
The is_kernel_inittext/is_kernel_text/is_kernel function should not
include the end address(the labels _einittext, _etext and _end) when
check the address range, the issue exists since Linux
On 2021/7/28 23:32, Steven Rostedt wrote:
On Wed, 28 Jul 2021 16:13:19 +0800
Kefeng Wang wrote:
@@ -64,8 +64,7 @@ const struct exception_table_entry
*search_exception_tables(unsigned long addr)
int notrace core_kernel_text(unsigned long addr)
{
- if (addr >= (unsigned l
On 2021/7/28 23:28, Steven Rostedt wrote:
On Wed, 28 Jul 2021 16:13:18 +0800
Kefeng Wang wrote:
The is_kernel[_text]() function check the address whether or not
in kernel[_text] ranges, also they will check the address whether
or not in gate area, so use better name.
Do you know what
The new is_kernel() check the kernel address ranges, and the
new is_kernel_text() check the kernel text section ranges.
Then use them to make some code clear.
Cc: Arnd Bergmann
Cc: Andrey Ryabinin
Signed-off-by: Kefeng Wang
---
include/asm-generic/sections.h | 27
Move core_kernel_data() into sections.h and rename it to
is_kernel_core_data(), also make it return bool value, then
update all the callers.
Cc: Arnd Bergmann
Cc: Steven Rostedt
Cc: Ingo Molnar
Cc: "David S. Miller"
Signed-off-by: Kefeng Wang
---
include/asm-generic/secti
Use is_kernel_text() and is_kernel_inittext() helper to simplify code,
also drop etext, _stext, _sinittext, _einittext declaration which
already declared in section.h.
Cc: Michael Ellerman
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Kefeng
The is_kernel_inittext() and init_kernel_text() are with same
functionality, let's just keep is_kernel_inittext() and move
it into sections.h, then update all the callers.
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Arnd Bergmann
Cc: x...@kernel.org
Signed-off-by: Kefeng Wang
---
arch/x86/kernel
...@vger.kernel.org
Signed-off-by: Kefeng Wang
---
arch/x86/net/bpf_jit_comp.c | 2 +-
include/linux/kallsyms.h| 8
kernel/cfi.c| 2 +-
3 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c
index 333650b9372a
Reviewed-by: Petr Mladek
Signed-off-by: Kefeng Wang
---
include/linux/kallsyms.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index 2a241e3f063f..b016c62f30a6 100644
--- a/include/linux/kallsyms.h
+++ b/include/linux
After commit 4ba66a976072 ("arch: remove blackfin port"),
no need arch-specific text/data check.
Cc: Arnd Bergmann
Signed-off-by: Kefeng Wang
---
include/asm-generic/sections.h | 16
include/linux/kallsyms.h | 3 +--
kernel/locking/lockdep.c | 3 --
independently
v1:
https://lore.kernel.org/linux-arch/20210626073439.150586-1-wangkefeng.w...@huawei.com
Kefeng Wang (7):
kallsyms: Remove arch specific text and data check
kallsyms: Fix address-checks for kernel related range
sections: Move and rename core_kernel_data
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