The patch titled Use __fls for fls64 on 64-bit archs has been added to the -mm tree. Its filename is use-__fls-for-fls64-on-64-bit-archs.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: Use __fls for fls64 on 64-bit archs From: Alexander van Heukelum <heukelum@xxxxxxxxxxxxx> Use __fls for fls64 on 64-bit archs. The implementation for 64-bit archs is moved from x86_64 to asm-generic. Signed-off-by: Alexander van Heukelum <heukelum@xxxxxxxxxxx> Cc: Richard Henderson <rth@xxxxxxxxxxx> Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx> Cc: "Luck, Tony" <tony.luck@xxxxxxxxx> Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Cc: Kyle McMartin <kyle@xxxxxxxxxxx> Cc: Grant Grundler <grundler@xxxxxxxxxxxxxxxx> Cc: Matthew Wilcox <matthew@xxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx> Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx> Cc: Paul Mundt <lethal@xxxxxxxxxxxx> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/asm-generic/bitops/fls64.h | 22 ++++++++++++++++++++++ include/asm-x86/bitops_64.h | 15 ++------------- 2 files changed, 24 insertions(+), 13 deletions(-) diff -puN include/asm-generic/bitops/fls64.h~use-__fls-for-fls64-on-64-bit-archs include/asm-generic/bitops/fls64.h --- a/include/asm-generic/bitops/fls64.h~use-__fls-for-fls64-on-64-bit-archs +++ a/include/asm-generic/bitops/fls64.h @@ -3,6 +3,18 @@ #include <asm/types.h> +/** + * fls64 - find last set bit in a 64-bit word + * @x: the word to search + * + * This is defined in a similar way as the libc and compiler builtin + * ffsll, but returns the position of the most significant set bit. + * + * fls64(value) returns 0 if value is 0 or the position of the last + * set bit if value is nonzero. The last (most significant) bit is + * at position 64. + */ +#if BITS_PER_LONG == 32 static inline int fls64(__u64 x) { __u32 h = x >> 32; @@ -10,5 +22,15 @@ static inline int fls64(__u64 x) return fls(h) + 32; return fls(x); } +#elif BITS_PER_LONG == 64 +static inline int fls64(__u64 x) +{ + if (x == 0) + return 0; + return __fls(x) + 1; +} +#else +#error BITS_PER_LONG not 32 or 64 +#endif #endif /* _ASM_GENERIC_BITOPS_FLS64_H_ */ diff -puN include/asm-x86/bitops_64.h~use-__fls-for-fls64-on-64-bit-archs include/asm-x86/bitops_64.h --- a/include/asm-x86/bitops_64.h~use-__fls-for-fls64-on-64-bit-archs +++ a/include/asm-x86/bitops_64.h @@ -112,19 +112,6 @@ static inline int ffs(int x) } /** - * fls64 - find last bit set in 64 bit word - * @x: the word to search - * - * This is defined the same way as fls. - */ -static inline int fls64(__u64 x) -{ - if (x == 0) - return 0; - return __fls(x) + 1; -} - -/** * fls - find last bit set * @x: the word to search * @@ -146,6 +133,8 @@ static inline int fls(int x) #endif /* __KERNEL__ */ +#include <asm-generic/bitops/fls64.h> + #ifdef __KERNEL__ #include <asm-generic/bitops/ext2-non-atomic.h> _ Patches currently in -mm which might be from heukelum@xxxxxxxxxxxxx are git-x86.patch introduce-a-generic-__fls-implementation.patch implement-__fls-on-all-64-bit-archs.patch use-__fls-for-fls64-on-64-bit-archs.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html