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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.

[[email protected]: coding-style fixes]
Signed-off-by: Alex Shi <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alex Shi authored and Linus Torvalds committed 2013-06-12 16:29:47 -07:00
1 parent 89dc991f0f
commit c2853c8df5
1 file changed
+4 -2
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include/linux/math64.h
+4 -2
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@@ -6,7 +6,8 @@
#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
@@ -47,7 +48,8 @@ static inline s64 div64_s64(s64 dividend, s64 divisor)
#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
static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)