Enabling '-Wsign-compare' compiler warnings on code that includes include/linux/bitops.h can generate the following warning: In file included from include/linux/kernel.h:10:0, from <random filename>:48: include/linux/bitops.h: In function 'hweight_long': include/linux/bitops.h:77:26: error: signed and unsigned type in conditional expression [-Werror=sign-compare] (converted to an error with -Werror) This is due to the use of the logical negation operator '!' in the __const_hweight8 macro in include/asm-generic/bitops/const_hweight.h. The use of that operator here results in a signed value. Fix by explicitly casting the __const_hweight8 macro expansion to 'unsigned int'. While here, clean up several checkpatch.pl warnings. Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1312180459580.30198@tamien Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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.. | ||
__ffs.h | ||
__fls.h | ||
arch_hweight.h | ||
atomic.h | ||
builtin-__ffs.h | ||
builtin-__fls.h | ||
builtin-ffs.h | ||
builtin-fls.h | ||
const_hweight.h | ||
count_zeros.h | ||
ext2-atomic-setbit.h | ||
ext2-atomic.h | ||
ffs.h | ||
ffz.h | ||
find.h | ||
fls.h | ||
fls64.h | ||
hweight.h | ||
le.h | ||
lock.h | ||
non-atomic.h | ||
sched.h |