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include/linux/math64.h: add div64_ul()

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There is div64_long() to handle the s64/long division, but no mocro do
u64/ul division.  It is necessary in some scenarios, so add this
function.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Alex Shi <alex.shi@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alex Shi 2013-06-12 14:05:10 -07:00 • committed by Linus Torvalds
parent 89dc991f0f
commit c2853c8df5
1 changed files with 4 additions and 2 deletions
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6
include/linux/math64.h
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@ -6,7 +6,8 @@
#if BITS_PER_LONG == 64 #if BITS_PER_LONG == 64
#define div64_long(x,y) div64_s64((x),(y)) #define div64_long(x, y) div64_s64((x), (y))
#define div64_ul(x, y) div64_u64((x), (y))
/** /**
* div_u64_rem - unsigned 64bit divide with 32bit divisor with remainder * div_u64_rem - unsigned 64bit divide with 32bit divisor with remainder
@ -47,7 +48,8 @@ static inline s64 div64_s64(s64 dividend, s64 divisor)
#elif BITS_PER_LONG == 32 #elif BITS_PER_LONG == 32
#define div64_long(x,y) div_s64((x),(y)) #define div64_long(x, y) div_s64((x), (y))
#define div64_ul(x, y) div_u64((x), (y))
#ifndef div_u64_rem #ifndef div_u64_rem
static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder) static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)