tree: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-4.20 head: e82b0b3828451c1cd331d9f304c6078fcd43b62e commit: e82b0b3828451c1cd331d9f304c6078fcd43b62e [83/83] spi: bcm2835: Fix race on DMA termination config: riscv-allyesconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 8.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout e82b0b3828451c1cd331d9f304c6078fcd43b62e # save the attached .config to linux build tree GCC_VERSION=8.1.0 make.cross ARCH=riscv All error/warnings (new ones prefixed by >>): In file included from arch/riscv/include/asm/atomic.h:23, from include/linux/atomic.h:7, from include/linux/mutex.h:18, from include/linux/notifier.h:14, from include/linux/clk.h:17, from drivers/spi/spi-bcm2835.c:24: drivers/spi/spi-bcm2835.c: In function 'bcm2835_spi_handle_err': >> arch/riscv/include/asm/cmpxchg.h:345:2: warning: '__ret' is used uninitialized in this function [-Wuninitialized] __ret; \ ^~~~~ arch/riscv/include/asm/cmpxchg.h:315:21: note: '__ret' was declared here __typeof__(*(ptr)) __ret; \ ^~~~~ arch/riscv/include/asm/cmpxchg.h:352:23: note: in expansion of macro '__cmpxchg' (__typeof__(*(ptr))) __cmpxchg((ptr), \ ^~~~~~~~~ drivers/spi/spi-bcm2835.c:619:6: note: in expansion of macro 'cmpxchg' if (cmpxchg(&bs->dma_pending, true, false)) { ^~~~~~~ drivers/spi/spi-bcm2835.c: In function 'bcm2835_spi_dma_done': >> arch/riscv/include/asm/cmpxchg.h:345:2: warning: '__ret' is used uninitialized in this function [-Wuninitialized] __ret; \ ^~~~~ arch/riscv/include/asm/cmpxchg.h:315:21: note: '__ret' was declared here __typeof__(*(ptr)) __ret; \ ^~~~~ arch/riscv/include/asm/cmpxchg.h:352:23: note: in expansion of macro '__cmpxchg' (__typeof__(*(ptr))) __cmpxchg((ptr), \ ^~~~~~~~~ drivers/spi/spi-bcm2835.c:235:6: note: in expansion of macro 'cmpxchg' if (cmpxchg(&bs->dma_pending, true, false)) { ^~~~~~~ In file included from include/asm-generic/getorder.h:7, from arch/riscv/include/asm/page.h:124, from drivers/spi/spi-bcm2835.c:23: drivers/spi/spi-bcm2835.c: In function 'bcm2835_spi_handle_err': >> include/linux/compiler.h:358:38: error: call to '__compiletime_assert_619' declared with attribute error: BUILD_BUG failed _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:338:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:358:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:45:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:79:21: note: in expansion of macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed") ^~~~~~~~~~~~~~~~ arch/riscv/include/asm/cmpxchg.h:343:3: note: in expansion of macro 'BUILD_BUG' BUILD_BUG(); \ ^~~~~~~~~ arch/riscv/include/asm/cmpxchg.h:352:23: note: in expansion of macro '__cmpxchg' (__typeof__(*(ptr))) __cmpxchg((ptr), \ ^~~~~~~~~ drivers/spi/spi-bcm2835.c:619:6: note: in expansion of macro 'cmpxchg' if (cmpxchg(&bs->dma_pending, true, false)) { ^~~~~~~ drivers/spi/spi-bcm2835.c: In function 'bcm2835_spi_dma_done': include/linux/compiler.h:358:38: error: call to '__compiletime_assert_235' declared with attribute error: BUILD_BUG failed _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:338:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:358:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:45:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:79:21: note: in expansion of macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed") ^~~~~~~~~~~~~~~~ arch/riscv/include/asm/cmpxchg.h:343:3: note: in expansion of macro 'BUILD_BUG' BUILD_BUG(); \ ^~~~~~~~~ arch/riscv/include/asm/cmpxchg.h:352:23: note: in expansion of macro '__cmpxchg' (__typeof__(*(ptr))) __cmpxchg((ptr), \ ^~~~~~~~~ drivers/spi/spi-bcm2835.c:235:6: note: in expansion of macro 'cmpxchg' if (cmpxchg(&bs->dma_pending, true, false)) { ^~~~~~~ vim +/__compiletime_assert_619 +358 include/linux/compiler.h 9a8ab1c3 Daniel Santos 2013-02-21 344 9a8ab1c3 Daniel Santos 2013-02-21 345 #define _compiletime_assert(condition, msg, prefix, suffix) \ 9a8ab1c3 Daniel Santos 2013-02-21 346 __compiletime_assert(condition, msg, prefix, suffix) 9a8ab1c3 Daniel Santos 2013-02-21 347 9a8ab1c3 Daniel Santos 2013-02-21 348 /** 9a8ab1c3 Daniel Santos 2013-02-21 349 * compiletime_assert - break build and emit msg if condition is false 9a8ab1c3 Daniel Santos 2013-02-21 350 * @condition: a compile-time constant condition to check 9a8ab1c3 Daniel Santos 2013-02-21 351 * @msg: a message to emit if condition is false 9a8ab1c3 Daniel Santos 2013-02-21 352 * 9a8ab1c3 Daniel Santos 2013-02-21 353 * In tradition of POSIX assert, this macro will break the build if the 9a8ab1c3 Daniel Santos 2013-02-21 354 * supplied condition is *false*, emitting the supplied error message if the 9a8ab1c3 Daniel Santos 2013-02-21 355 * compiler has support to do so. 9a8ab1c3 Daniel Santos 2013-02-21 356 */ 9a8ab1c3 Daniel Santos 2013-02-21 357 #define compiletime_assert(condition, msg) \ 9a8ab1c3 Daniel Santos 2013-02-21 @358 _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) 9a8ab1c3 Daniel Santos 2013-02-21 359 :::::: The code at line 358 was first introduced by commit :::::: 9a8ab1c39970a4938a72d94e6fd13be88a797590 bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG :::::: TO: Daniel Santos <daniel.santos@xxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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