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Move round_up/down to kernel.h

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... in preparation of moving early_res to kernel/.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <1265793639-15071-26-git-send-email-yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Yinghai Lu 2010-02-10 01:20:29 -08:00 committed by H. Peter Anvin
parent 59be5a8e8c
commit 9b3be9f992
2 changed files with 10 additions and 10 deletions
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10
arch/x86/include/asm/proto.h
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@ -23,14 +23,4 @@ extern int reboot_force;
long do_arch_prctl(struct task_struct *task, int code, unsigned long addr);
/*
* This looks more complex than it should be. But we need to
* get the type for the ~ right in round_down (it needs to be
* as wide as the result!), and we want to evaluate the macro
* arguments just once each.
*/
#define __round_mask(x,y) ((__typeof__(x))((y)-1))
#define round_up(x,y) ((((x)-1) | __round_mask(x,y))+1)
#define round_down(x,y) ((x) & ~__round_mask(x,y))
#endif /* _ASM_X86_PROTO_H */

10
include/linux/kernel.h
View File

@ -44,6 +44,16 @@ extern const char linux_proc_banner[];
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
/*
* This looks more complex than it should be. But we need to
* get the type for the ~ right in round_down (it needs to be
* as wide as the result!), and we want to evaluate the macro
* arguments just once each.
*/
#define __round_mask(x, y) ((__typeof__(x))((y)-1))
#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
#define round_down(x, y) ((x) & ~__round_mask(x, y))
#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))