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include: kernel.h: define SSIZE_MAX

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Define SSIZE_MAX, the largest value fitting into a variable of type
ssize_t.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt
2020-08-23 09:54:44 +02:00
parent fa63753f86
commit ed0b10722c
1 changed files with 3 additions and 0 deletions
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3
include/linux/kernel.h
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@@ -19,6 +19,9 @@
#ifndef SIZE_MAX #ifndef SIZE_MAX
#define SIZE_MAX (~(size_t)0) #define SIZE_MAX (~(size_t)0)
#endif #endif
#ifndef SSIZE_MAX
#define SSIZE_MAX ((ssize_t)(SIZE_MAX >> 1))
#endif
#define U8_MAX ((u8)~0U) #define U8_MAX ((u8)~0U)
#define S8_MAX ((s8)(U8_MAX>>1)) #define S8_MAX ((s8)(U8_MAX>>1))