CC: [email protected] CC: [email protected] CC: [email protected] TO: Jakub Jelinek <[email protected]> CC: "Peter Zijlstra (Intel)" <[email protected]> CC: Andrew Morton <[email protected]> CC: Linux Memory Management List <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cd8c917a56f20f48748dd43d9ae3caff51d5b987 commit: 2f78788b55baa3410b1ec91a576286abe1ad4d6a ilog2: improve ilog2 for constant arguments date: 12 months ago :::::: branch date: 29 hours ago :::::: commit date: 12 months ago config: arm-randconfig-c002-20211126 (https://download.01.org/0day-ci/archive/20211208/[email protected]/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5162b558d8c0b542e752b037e72a69d5fd51eb1e) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2f78788b55baa3410b1ec91a576286abe1ad4d6a git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 2f78788b55baa3410b1ec91a576286abe1ad4d6a # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> clang-analyzer warnings: (new ones prefixed by >>) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/locking/lockdep.c:1982:2: note: The value of 'parent' is assigned to 'first_parent' first_parent = parent; ^~~~~~~~~~~~~~~~~~~~~ kernel/locking/lockdep.c:1984:9: note: Assuming pointer value is null while (parent) { ^~~~~~ kernel/locking/lockdep.c:1984:2: note: Loop condition is false. Execution continues on line 1989 while (parent) { ^ kernel/locking/lockdep.c:1991:10: note: Passing null pointer value via 3rd parameter 'prt' first_parent); ^~~~~~~~~~~~ kernel/locking/lockdep.c:1990:2: note: Calling 'print_circular_lock_scenario' print_circular_lock_scenario(check_src, check_tgt, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/locking/lockdep.c:1823:30: note: Access to field 'class' results in a dereference of a null pointer (loaded from variable 'prt') struct lock_class *parent = prt->class; ^~~ Suppressed 13 warnings (11 in non-user code, 2 with check filters). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 18 warnings generated. crypto/sha512_generic.c:148:2: warning: Value stored to 'a' is never read [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:2: note: Value stored to 'a' is never read a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:6: warning: Although the value stored to 'b' is used in the enclosing expression, the value is never actually read from 'b' [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:6: note: Although the value stored to 'b' is used in the enclosing expression, the value is never actually read from 'b' a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:10: warning: Although the value stored to 'c' is used in the enclosing expression, the value is never actually read from 'c' [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:10: note: Although the value stored to 'c' is used in the enclosing expression, the value is never actually read from 'c' a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:14: warning: Although the value stored to 'd' is used in the enclosing expression, the value is never actually read from 'd' [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:14: note: Although the value stored to 'd' is used in the enclosing expression, the value is never actually read from 'd' a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:18: warning: Although the value stored to 'e' is used in the enclosing expression, the value is never actually read from 'e' [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:18: note: Although the value stored to 'e' is used in the enclosing expression, the value is never actually read from 'e' a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:22: warning: Although the value stored to 'f' is used in the enclosing expression, the value is never actually read from 'f' [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:22: note: Although the value stored to 'f' is used in the enclosing expression, the value is never actually read from 'f' a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:26: warning: Although the value stored to 'g' is used in the enclosing expression, the value is never actually read from 'g' [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:26: note: Although the value stored to 'g' is used in the enclosing expression, the value is never actually read from 'g' a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~~~~~ crypto/sha512_generic.c:148:30: warning: Although the value stored to 'h' is used in the enclosing expression, the value is never actually read from 'h' [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~ crypto/sha512_generic.c:148:30: note: Although the value stored to 'h' is used in the enclosing expression, the value is never actually read from 'h' a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~~~~~~ crypto/sha512_generic.c:148:34: warning: Although the value stored to 't1' is used in the enclosing expression, the value is never actually read from 't1' [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~ crypto/sha512_generic.c:148:34: note: Although the value stored to 't1' is used in the enclosing expression, the value is never actually read from 't1' a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~~~~~~ crypto/sha512_generic.c:148:39: warning: Although the value stored to 't2' is used in the enclosing expression, the value is never actually read from 't2' [clang-analyzer-deadcode.DeadStores] a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~ crypto/sha512_generic.c:148:39: note: Although the value stored to 't2' is used in the enclosing expression, the value is never actually read from 't2' a = b = c = d = e = f = g = h = t1 = t2 = 0; ^ ~ Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. >> drivers/pci/endpoint/pci-epc-mem.c:29:7: warning: Assigned value is garbage >> or undefined [clang-analyzer-core.uninitialized.Assign] size >>= page_shift; ^ drivers/pci/endpoint/pci-epc-mem.c:244:7: note: 'mem' is non-null if (!mem) { ^~~ drivers/pci/endpoint/pci-epc-mem.c:244:2: note: Taking false branch if (!mem) { ^ drivers/pci/endpoint/pci-epc-mem.c:250:15: note: '?' condition is false page_shift = ilog2(page_size); ^ include/linux/log2.h:158:2: note: expanded from macro 'ilog2' __builtin_constant_p(n) ? \ ^ drivers/pci/endpoint/pci-epc-mem.c:250:15: note: '?' condition is true page_shift = ilog2(page_size); ^ include/linux/log2.h:161:2: note: expanded from macro 'ilog2' (sizeof(n) <= 4) ? \ ^ drivers/pci/endpoint/pci-epc-mem.c:254:10: note: Calling 'pci_epc_mem_get_order' order = pci_epc_mem_get_order(mem, size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/pci/endpoint/pci-epc-mem.c:26:28: note: '?' condition is false unsigned int page_shift = ilog2(mem->window.page_size); ^ include/linux/log2.h:158:2: note: expanded from macro 'ilog2' __builtin_constant_p(n) ? \ ^ drivers/pci/endpoint/pci-epc-mem.c:26:28: note: '?' condition is true unsigned int page_shift = ilog2(mem->window.page_size); ^ include/linux/log2.h:161:2: note: expanded from macro 'ilog2' (sizeof(n) <= 4) ? \ ^ drivers/pci/endpoint/pci-epc-mem.c:26:28: note: Calling '__ilog2_u32' unsigned int page_shift = ilog2(mem->window.page_size); ^ include/linux/log2.h:162:2: note: expanded from macro 'ilog2' __ilog2_u32(n) : \ ^~~~~~~~~~~~~~ include/linux/log2.h:24:2: note: Returning the value -1 return fls(n) - 1; ^~~~~~~~~~~~~~~~~ drivers/pci/endpoint/pci-epc-mem.c:26:28: note: Returning from '__ilog2_u32' unsigned int page_shift = ilog2(mem->window.page_size); ^ include/linux/log2.h:162:2: note: expanded from macro 'ilog2' __ilog2_u32(n) : \ ^~~~~~~~~~~~~~ drivers/pci/endpoint/pci-epc-mem.c:26:2: note: 'page_shift' initialized to 4294967295 unsigned int page_shift = ilog2(mem->window.page_size); ^~~~~~~~~~~~~~~~~~~~~~~ drivers/pci/endpoint/pci-epc-mem.c:29:7: note: Assigned value is garbage or undefined size >>= page_shift; ^ ~~~~~~~~~~ Suppressed 7 warnings (7 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. drivers/pci/endpoint/functions/pci-epf-test.c:758:17: warning: Access to field 'msix_capable' results in a dereference of a null pointer (loaded from variable 'epc_features') [clang-analyzer-core.NullDereference] msix_capable = epc_features->msix_capable; ^ drivers/pci/endpoint/functions/pci-epf-test.c:829:19: note: Assuming 'epc' is non-null if (WARN_ON_ONCE(!epc)) ^ include/asm-generic/bug.h:145:27: note: expanded from macro 'WARN_ON_ONCE' int __ret_warn_once = !!(condition); \ ^~~~~~~~~ drivers/pci/endpoint/functions/pci-epf-test.c:829:6: note: '__ret_warn_once' is 0 if (WARN_ON_ONCE(!epc)) ^ include/asm-generic/bug.h:147:15: note: expanded from macro 'WARN_ON_ONCE' if (unlikely(__ret_warn_once && !__warned)) { \ ^~~~~~~~~~~~~~~ include/linux/compiler.h:48:41: note: expanded from macro 'unlikely' # define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x))) ^ include/linux/compiler.h:33:34: note: expanded from macro '__branch_check__' ______r = __builtin_expect(!!(x), expect); \ ^ drivers/pci/endpoint/functions/pci-epf-test.c:829:6: note: Left side of '&&' is false if (WARN_ON_ONCE(!epc)) ^ include/asm-generic/bug.h:147:31: note: expanded from macro 'WARN_ON_ONCE' if (unlikely(__ret_warn_once && !__warned)) { \ ^ drivers/pci/endpoint/functions/pci-epf-test.c:829:6: note: '__ret_warn_once' is 0 if (WARN_ON_ONCE(!epc)) ^ include/asm-generic/bug.h:147:15: note: expanded from macro 'WARN_ON_ONCE' if (unlikely(__ret_warn_once && !__warned)) { \ ^~~~~~~~~~~~~~~ include/linux/compiler.h:48:68: note: expanded from macro 'unlikely' # define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x))) ^ include/linux/compiler.h:35:19: note: expanded from macro '__branch_check__' expect, is_constant); \ ^~~~~~~~~~~ drivers/pci/endpoint/functions/pci-epf-test.c:829:6: note: Left side of '&&' is false if (WARN_ON_ONCE(!epc)) -- ^~~~ drivers/net/ethernet/brocade/bna/bnad.c:1243:3: note: Taking false branch if (!ccb) ^ drivers/net/ethernet/brocade/bna/bnad.c:1248:3: note: Loop condition is true. Entering loop body for (j = 0; j < BNAD_MAX_RXQ_PER_RXP; j++) { ^ drivers/net/ethernet/brocade/bna/bnad.c:1250:8: note: Assuming 'rcb' is non-null if (!rcb) ^~~~ drivers/net/ethernet/brocade/bna/bnad.c:1250:4: note: Taking false branch if (!rcb) ^ drivers/net/ethernet/brocade/bna/bnad.c:1253:4: note: Calling 'bnad_rxq_alloc_init' bnad_rxq_alloc_init(bnad, rcb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:266:10: note: Calling 'get_order' order = get_order(rcb->rxq->buffer_size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/getorder.h:31:2: note: Taking false branch if (__builtin_constant_p(size)) { ^ include/asm-generic/getorder.h:44:9: note: Calling 'fls' return fls(size); ^~~~~~~~~ include/asm-generic/bitops/fls.h:15:2: note: 'r' initialized to 32 int r = 32; ^~~~~ include/asm-generic/bitops/fls.h:17:6: note: Assuming 'x' is not equal to 0, which participates in a condition later if (!x) ^~ include/asm-generic/bitops/fls.h:17:2: note: Taking false branch if (!x) ^ include/asm-generic/bitops/fls.h:19:6: note: Assuming the condition is false if (!(x & 0xffff0000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:19:2: note: Taking false branch if (!(x & 0xffff0000u)) { ^ include/asm-generic/bitops/fls.h:23:6: note: Assuming the condition is false if (!(x & 0xff000000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:23:2: note: Taking false branch if (!(x & 0xff000000u)) { ^ include/asm-generic/bitops/fls.h:27:6: note: Assuming the condition is false if (!(x & 0xf0000000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:27:2: note: Taking false branch if (!(x & 0xf0000000u)) { ^ include/asm-generic/bitops/fls.h:31:6: note: Assuming the condition is false if (!(x & 0xc0000000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:31:2: note: Taking false branch if (!(x & 0xc0000000u)) { ^ include/asm-generic/bitops/fls.h:35:6: note: Assuming the condition is false if (!(x & 0x80000000u)) { ^~~~~~~~~~~~~~~~~~ include/asm-generic/bitops/fls.h:35:2: note: Taking false branch if (!(x & 0x80000000u)) { ^ include/asm-generic/bitops/fls.h:39:2: note: Returning the value 32 (loaded from 'r') return r; ^~~~~~~~ include/asm-generic/getorder.h:44:9: note: Returning from 'fls' return fls(size); ^~~~~~~~~ include/asm-generic/getorder.h:44:2: note: Returning the value 32 return fls(size); ^~~~~~~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:266:10: note: Returning from 'get_order' order = get_order(rcb->rxq->buffer_size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:266:2: note: The value 32 is assigned to 'order' order = get_order(rcb->rxq->buffer_size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:270:6: note: Assuming the condition is true if (bna_is_small_rxq(rcb->id)) { ^ drivers/net/ethernet/brocade/bna/bna.h:23:32: note: expanded from macro 'bna_is_small_rxq' #define bna_is_small_rxq(_id) ((_id) & 0x1) ^~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:270:2: note: Taking true branch if (bna_is_small_rxq(rcb->id)) { ^ drivers/net/ethernet/brocade/bna/bnad.c:286:20: note: The result of the left shift is undefined due to shifting by '32', which is greater or equal to the width of type 'unsigned long' BUG_ON((PAGE_SIZE << order) % unmap_q->map_size); ^ include/asm-generic/bug.h:63:45: note: expanded from macro 'BUG_ON' #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0) ^~~~~~~~~ include/linux/compiler.h:48:41: note: expanded from macro 'unlikely' # define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x))) ^ include/linux/compiler.h:33:34: note: expanded from macro '__branch_check__' ______r = __builtin_expect(!!(x), expect); \ ^ >> drivers/net/ethernet/brocade/bna/bnad.c:286:30: warning: Division by zero >> [clang-analyzer-core.DivideZero] BUG_ON((PAGE_SIZE << order) % unmap_q->map_size); ^ drivers/net/ethernet/brocade/bna/bnad.c:1240:2: note: Loop condition is true. Entering loop body for (i = 0; i < BNAD_MAX_RXP_PER_RX; i++) { ^ drivers/net/ethernet/brocade/bna/bnad.c:1243:7: note: Assuming 'ccb' is non-null if (!ccb) ^~~~ drivers/net/ethernet/brocade/bna/bnad.c:1243:3: note: Taking false branch if (!ccb) ^ drivers/net/ethernet/brocade/bna/bnad.c:1248:3: note: Loop condition is true. Entering loop body for (j = 0; j < BNAD_MAX_RXQ_PER_RXP; j++) { ^ drivers/net/ethernet/brocade/bna/bnad.c:1250:8: note: Assuming 'rcb' is non-null if (!rcb) ^~~~ drivers/net/ethernet/brocade/bna/bnad.c:1250:4: note: Taking false branch if (!rcb) ^ drivers/net/ethernet/brocade/bna/bnad.c:1253:4: note: Calling 'bnad_rxq_alloc_init' bnad_rxq_alloc_init(bnad, rcb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:270:6: note: Assuming the condition is false if (bna_is_small_rxq(rcb->id)) { ^ drivers/net/ethernet/brocade/bna/bna.h:23:32: note: expanded from macro 'bna_is_small_rxq' #define bna_is_small_rxq(_id) ((_id) & 0x1) ^~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:270:2: note: Taking false branch if (bna_is_small_rxq(rcb->id)) { ^ drivers/net/ethernet/brocade/bna/bnad.c:274:7: note: Assuming field 'multi_buffer' is 0 if (rcb->rxq->multi_buffer) { ^~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:274:3: note: Taking false branch if (rcb->rxq->multi_buffer) { ^ drivers/net/ethernet/brocade/bna/bnad.c:281:6: note: Assuming field 'buffer_size' is > 2048 (rcb->rxq->buffer_size > 2048) ? ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:281:5: note: '?' condition is true (rcb->rxq->buffer_size > 2048) ? ^ drivers/net/ethernet/brocade/bna/bnad.c:280:4: note: The value 0 is assigned to field 'map_size' unmap_q->map_size = ^~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/brocade/bna/bnad.c:286:30: note: Division by zero BUG_ON((PAGE_SIZE << order) % unmap_q->map_size); ^ include/asm-generic/bug.h:63:45: note: expanded from macro 'BUG_ON' #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0) ~~~~~~~~~^~~~~~~~~~ include/linux/compiler.h:48:41: note: expanded from macro 'unlikely' # define unlikely(x) (__branch_check__(x, 0, __builtin_constant_p(x))) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:33:34: note: expanded from macro '__branch_check__' ______r = __builtin_expect(!!(x), expect); \ ^ drivers/net/ethernet/brocade/bna/bnad.c:396:3: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign] BNA_SET_DMA_ADDR(dma_addr, &rxent->host_addr); ^ drivers/net/ethernet/brocade/bna/bna.h:34:23: note: expanded from macro 'BNA_SET_DMA_ADDR' (_bna_dma_addr)->lsb = ((struct bna_dma_addr *)&tmp_addr)->lsb; \ ^ drivers/net/ethernet/brocade/bna/bnad.c:1860:3: note: Left side of '&&' is false container_of(napi, struct bnad_rx_ctrl, napi); ^ include/linux/kernel.h:694:61: note: expanded from macro 'container_of' BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ ^ drivers/net/ethernet/brocade/bna/bnad.c:1860:3: note: Taking false branch container_of(napi, struct bnad_rx_ctrl, napi); ^ include/linux/kernel.h:694:2: note: expanded from macro 'container_of' BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ ^ include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^ include/linux/compiler_types.h:315:2: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ include/linux/compiler_types.h:303:2: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:295:3: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^ drivers/net/ethernet/brocade/bna/bnad.c:1860:3: note: Loop condition is false. Exiting loop container_of(napi, struct bnad_rx_ctrl, napi); ^ include/linux/kernel.h:694:2: note: expanded from macro 'container_of' BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ ^ include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^ include/linux/compiler_types.h:315:2: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) vim +29 drivers/pci/endpoint/pci-epc-mem.c 5e8cb4033807e3 Kishon Vijay Abraham I 2017-04-10 14 5e8cb4033807e3 Kishon Vijay Abraham I 2017-04-10 15 /** 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 16 * pci_epc_mem_get_order() - determine the allocation order of a memory size 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 17 * @mem: address space of the endpoint controller 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 18 * @size: the size for which to get the order 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 19 * 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 20 * Reimplement get_order() for mem->page_size since the generic get_order 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 21 * always gets order with a constant PAGE_SIZE. 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 22 */ 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 23 static int pci_epc_mem_get_order(struct pci_epc_mem *mem, size_t size) 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 24 { 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 25 int order; d45e3c1a5979ef Lad Prabhakar 2020-05-07 26 unsigned int page_shift = ilog2(mem->window.page_size); 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 27 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 28 size--; 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 @29 size >>= page_shift; 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 30 #if BITS_PER_LONG == 32 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 31 order = fls(size); 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 32 #else 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 33 order = fls64(size); 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 34 #endif 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 35 return order; 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 36 } 52c9285d47459c Kishon Vijay Abraham I 2017-08-18 37 :::::: The code at line 29 was first introduced by commit :::::: 52c9285d47459cf241e144c7d8ef15941ba1b181 PCI: endpoint: Add support for configurable page size :::::: TO: Kishon Vijay Abraham I <[email protected]> :::::: CC: Bjorn Helgaas <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected] _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
