tree: git://people.freedesktop.org/~agd5f/linux.git amd-staging-drm-next head: dcae401d111324489c066aa57ed9c77b97b475f9 commit: e2e8b699af4f02a8ce46d338bbb1d227f68523b1 [1033/1053] drm/amd/powerplay: add CI asics support to smumgr config: ia64-allyesconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 6.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout e2e8b699af4f02a8ce46d338bbb1d227f68523b1 # save the attached .config to linux build tree make.cross ARCH=ia64

Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings

All warnings (new ones prefixed by >>):

In file included from include/uapi/linux/swab.h:6:0, from include/linux/swab.h:4, from include/uapi/linux/byteorder/little_endian.h:12, from include/linux/byteorder/little_endian.h:4, from arch/ia64/include/uapi/asm/byteorder.h:4, from include/asm-generic/bitops/le.h:5, from arch/ia64/include/asm/bitops.h:448, from include/linux/bitops.h:36, from include/linux/kernel.h:10, from include/linux/list.h:8, from include/linux/module.h:9, from drivers/gpu/drm/amd/amdgpu/../powerplay/smumgr/ci_smc.c:23: drivers/gpu/drm/amd/amdgpu/../powerplay/smumgr/ci_smc.c: In function 'ci_init_smc_table':

...

arch/ia64/include/uapi/asm/swab.h:20:23: warning: 'tmp' may be used uninitialized in this function [-Wmaybe-uninitialized]

#define __arch_swab64 __arch_swab64 ^~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../powerplay/smumgr/ci_smc.c:571:11: note: 'tmp' was declared here uint16_t tmp; ^~~ -- In file included from include/uapi/linux/swab.h:6:0, from include/linux/swab.h:4, from include/uapi/linux/byteorder/little_endian.h:12, from include/linux/byteorder/little_endian.h:4, from arch/ia64/include/uapi/asm/byteorder.h:4, from include/asm-generic/bitops/le.h:5, from arch/ia64/include/asm/bitops.h:448, from include/linux/bitops.h:36, from include/linux/kernel.h:10, from include/linux/list.h:8, from include/linux/module.h:9, from drivers/gpu//drm/amd/amdgpu/../powerplay/smumgr/ci_smc.c:23: drivers/gpu//drm/amd/amdgpu/../powerplay/smumgr/ci_smc.c: In function 'ci_init_smc_table':

...

arch/ia64/include/uapi/asm/swab.h:20:23: warning: 'tmp' may be used uninitialized in this function [-Wmaybe-uninitialized]

#define __arch_swab64 __arch_swab64 ^~~~~~~~~~~~~ drivers/gpu//drm/amd/amdgpu/../powerplay/smumgr/ci_smc.c:571:11: note: 'tmp' was declared here uint16_t tmp; ^~~

vim +/tmp +20 arch/ia64/include/uapi/asm/swab.h

ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 12 ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 13 static __inline__ __attribute_const__ __u64 __arch_swab64(__u64 x) ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 14 { ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 15 __u64 result; ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 16 ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 17 result = ia64_mux1(x, ia64_mux1_rev); ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 18 return result; ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 19 } ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 @20 #define __arch_swab64 __arch_swab64 ae189623 arch/ia64/include/asm/swab.h Harvey Harrison 2009-01-06 21

:::::: The code at line 20 was first introduced by commit :::::: ae189623b7248cd245c068a1aeb4983359f9c088 ia64: introduce asm/swab.h

:::::: TO: Harvey Harrison harvey.harrison@gmail.com :::::: CC: Linus Torvalds torvalds@linux-foundation.org

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