CC: [email protected] CC: [email protected] BCC: [email protected] CC: [email protected] TO: Gabriel Somlo <[email protected]> CC: Ulf Hansson <[email protected]> CC: Kamil Rakoczy <[email protected]> CC: Maciej Dudek <[email protected]> CC: Paul Mackerras <[email protected]> CC: Joel Stanley <[email protected]> CC: Andy Shevchenko <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f022814633e1c600507b3a99691b4d624c2813f0 commit: 92e099104729d7284d37bc0f49f8a9d30f3e0521 mmc: Add driver for LiteX's LiteSDCard interface date: 4 weeks ago :::::: branch date: 8 hours ago :::::: commit date: 4 weeks ago config: riscv-randconfig-c006-20220327 (https://download.01.org/0day-ci/archive/20220327/[email protected]/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0f6d9501cf49ce02937099350d08f20c4af86f3d) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=92e099104729d7284d37bc0f49f8a9d30f3e0521 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 92e099104729d7284d37bc0f49f8a9d30f3e0521 # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 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 >>) ^ include/linux/printk.h:392:34: note: expanded from macro '__printk_index_emit' #define __printk_index_emit(...) do {} while (0) ^ drivers/usb/gadget/function/f_fs.c:1703:10: note: Assuming the condition is true BUG_ON(waitqueue_active(&ffs->ev.waitq) || ^ include/asm-generic/bug.h:161:45: note: expanded from macro 'BUG_ON' #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0) ^~~~~~~~~ include/linux/compiler.h:78:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ drivers/usb/gadget/function/f_fs.c:1703:43: note: Left side of '||' is true BUG_ON(waitqueue_active(&ffs->ev.waitq) || ^ drivers/usb/gadget/function/f_fs.c:1703:3: note: Assuming the condition is false BUG_ON(waitqueue_active(&ffs->ev.waitq) || ^ include/asm-generic/bug.h:161:36: note: expanded from macro 'BUG_ON' #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0) ^~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:78:22: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/usb/gadget/function/f_fs.c:1703:3: note: Taking false branch BUG_ON(waitqueue_active(&ffs->ev.waitq) || ^ include/asm-generic/bug.h:161:32: note: expanded from macro 'BUG_ON' #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0) ^ drivers/usb/gadget/function/f_fs.c:1703:3: note: Loop condition is false. Exiting loop BUG_ON(waitqueue_active(&ffs->ev.waitq) || ^ include/asm-generic/bug.h:161:27: note: expanded from macro 'BUG_ON' #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0) ^ drivers/usb/gadget/function/f_fs.c:1708:3: note: Memory is released kfree(ffs); ^~~~~~~~~~ drivers/usb/gadget/function/f_fs.c:1889:3: note: Returning; memory was released via 1st parameter ffs_data_put(ffs); ^~~~~~~~~~~~~~~~~ drivers/usb/gadget/function/f_fs.c:3605:3: note: Returning; memory was released via 1st parameter functionfs_unbind(ffs); ^~~~~~~~~~~~~~~~~~~~~~ drivers/usb/gadget/function/f_fs.c:3608:2: note: Calling 'spinlock_check' spin_lock_irqsave(&func->ffs->eps_lock, flags); ^ include/linux/spinlock.h:379:24: note: expanded from macro 'spin_lock_irqsave' raw_spin_lock_irqsave(spinlock_check(lock), flags); \ ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/spinlock.h:242:34: note: expanded from macro 'raw_spin_lock_irqsave' flags = _raw_spin_lock_irqsave(lock); \ ^~~~ include/linux/spinlock.h:324:2: note: Use of memory after it is freed return &lock->rlock; ^ ~~~~~~~~~~~~ Suppressed 2 warnings (2 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. 2 warnings generated. Suppressed 2 warnings (2 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. 2 warnings generated. Suppressed 2 warnings (2 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. 3 warnings generated. drivers/spi/spi-omap2-mcspi.c:1232:3: warning: Value stored to 'par_override' is never read [clang-analyzer-deadcode.DeadStores] par_override = 0; ^ ~ drivers/spi/spi-omap2-mcspi.c:1232:3: note: Value stored to 'par_override' is never read par_override = 0; ^ ~ Suppressed 2 warnings (2 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. 3 warnings generated. drivers/spi/spi-ti-qspi.c:864:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] ret = 0; ^ ~ drivers/spi/spi-ti-qspi.c:864:3: note: Value stored to 'ret' is never read ret = 0; ^ ~ Suppressed 2 warnings (2 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. 2 warnings generated. Suppressed 2 warnings (2 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. 2 warnings generated. Suppressed 2 warnings (2 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. 2 warnings generated. Suppressed 2 warnings (2 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. 2 warnings generated. Suppressed 2 warnings (2 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. 2 warnings generated. Suppressed 2 warnings (2 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. >> drivers/mmc/host/litex_mmc.c:436:17: warning: Value stored to 'dev' during >> its initialization is never read [clang-analyzer-deadcode.DeadStores] struct device *dev = mmc_dev(host->mmc); ^~~ drivers/mmc/host/litex_mmc.c:436:17: note: Value stored to 'dev' during its initialization is never read struct device *dev = mmc_dev(host->mmc); ^~~ include/linux/log2.h:57:13: warning: 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' [clang-analyzer-core.UndefinedBinaryOperatorResult] return 1UL << fls_long(n - 1); ^ drivers/mmc/host/litex_mmc.c:460:6: note: Assuming field 'clock' is not equal to field 'sd_clk' if (ios->clock != host->sd_clk) ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/mmc/host/litex_mmc.c:460:2: note: Taking true branch if (ios->clock != host->sd_clk) ^ drivers/mmc/host/litex_mmc.c:461:3: note: Calling 'litex_mmc_setclk' litex_mmc_setclk(host, ios->clock); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/mmc/host/litex_mmc.c:439:8: note: Assuming 'freq' is not equal to 0 div = freq ? host->ref_clk / freq : 256U; ^~~~ drivers/mmc/host/litex_mmc.c:439:8: note: '?' condition is true drivers/mmc/host/litex_mmc.c:440:8: note: '?' condition is false div = roundup_pow_of_two(div); ^ include/linux/log2.h:176:2: note: expanded from macro 'roundup_pow_of_two' __builtin_constant_p(n) ? ( \ ^ drivers/mmc/host/litex_mmc.c:440:8: note: Calling '__roundup_pow_of_two' div = roundup_pow_of_two(div); ^ include/linux/log2.h:180:2: note: expanded from macro 'roundup_pow_of_two' __roundup_pow_of_two(n) \ ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/log2.h:57:16: note: Calling 'fls_long' return 1UL << fls_long(n - 1); ^~~~~~~~~~~~~~~ include/linux/bitops.h:154:2: note: Taking true branch if (sizeof(l) == 4) ^ include/linux/bitops.h:155:10: note: Calling 'fls' return fls(l); ^~~~~~ 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/linux/bitops.h:155:10: note: Returning from 'fls' return fls(l); ^~~~~~ include/linux/bitops.h:155:3: note: Returning the value 32 return fls(l); ^~~~~~~~~~~~~ include/linux/log2.h:57:16: note: Returning from 'fls_long' return 1UL << fls_long(n - 1); ^~~~~~~~~~~~~~~ include/linux/log2.h:57:13: 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' return 1UL << fls_long(n - 1); ^ ~~~~~~~~~~~~~~~ Suppressed 2 warnings (2 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. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). vim +/dev +436 drivers/mmc/host/litex_mmc.c 92e099104729d7 Gabriel Somlo 2022-01-13 433 92e099104729d7 Gabriel Somlo 2022-01-13 434 static void litex_mmc_setclk(struct litex_mmc_host *host, unsigned int freq) 92e099104729d7 Gabriel Somlo 2022-01-13 435 { 92e099104729d7 Gabriel Somlo 2022-01-13 @436 struct device *dev = mmc_dev(host->mmc); 92e099104729d7 Gabriel Somlo 2022-01-13 437 u32 div; 92e099104729d7 Gabriel Somlo 2022-01-13 438 92e099104729d7 Gabriel Somlo 2022-01-13 439 div = freq ? host->ref_clk / freq : 256U; 92e099104729d7 Gabriel Somlo 2022-01-13 440 div = roundup_pow_of_two(div); 92e099104729d7 Gabriel Somlo 2022-01-13 441 div = clamp(div, 2U, 256U); 92e099104729d7 Gabriel Somlo 2022-01-13 442 dev_dbg(dev, "sd_clk_freq=%d: set to %d via div=%d\n", 92e099104729d7 Gabriel Somlo 2022-01-13 443 freq, host->ref_clk / div, div); 92e099104729d7 Gabriel Somlo 2022-01-13 444 litex_write16(host->sdphy + LITEX_PHY_CLOCKERDIV, div); 92e099104729d7 Gabriel Somlo 2022-01-13 445 host->sd_clk = freq; 92e099104729d7 Gabriel Somlo 2022-01-13 446 } 92e099104729d7 Gabriel Somlo 2022-01-13 447 -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
