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Commit 89a07141 authored by Alex Elder's avatar Alex Elder Committed by Linus Torvalds
Browse files

kernel.h: define u8, s8, u32, etc. limits 



Create constants that define the maximum and minimum values
representable by the kernel types u8, s8, u16, s16, and so on.

Signed-off-by: default avatarAlex Elder <elder@linaro.org>
Cc: Sage Weil <sage@inktank.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 77719536

include/linux/kernel.h

+13 −0
Original line number Diff line number Diff line
@@ -29,6 +29,19 @@ 
#define ULLONG_MAX	(~0ULL)

#define SIZE_MAX	(~(size_t)0)



#define U8_MAX		((u8)~0U)

#define S8_MAX		((s8)(U8_MAX>>1))

#define S8_MIN		((s8)(-S8_MAX - 1))

#define U16_MAX		((u16)~0U)

#define S16_MAX		((s16)(U16_MAX>>1))

#define S16_MIN		((s16)(-S16_MAX - 1))

#define U32_MAX		((u32)~0U)

#define S32_MAX		((s32)(U32_MAX>>1))

#define S32_MIN		((s32)(-S32_MAX - 1))

#define U64_MAX		((u64)~0ULL)

#define S64_MAX		((s64)(U64_MAX>>1))

#define S64_MIN		((s64)(-S64_MAX - 1))



#define STACK_MAGIC	0xdeadbeef



#define REPEAT_BYTE(x)	((~0ul / 0xff) * (x))