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[PATCH] unify PFN_* macros

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Just about every architecture defines some macros to do operations on pfns.
 They're all virtually identical.  This patch consolidates all of them.

One minor glitch is that at least i386 uses them in a very skeletal header
file.  To keep away from #include dependency hell, I stuck the new
definitions in a new, isolated header.

Of all of the implementations, sh64 is the only one that varied by a bit.
It used some masks to ensure that any sign-extension got ripped away before
the arithmetic is done.  This has been posted to that sh64 maintainers and
the development list.

Compiles on x86, x86_64, ia64 and ppc64.

Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dave Hansen
2006-03-27 01:16:04 -08:00
committed by Linus Torvalds
parent 95144c788d
commit 22a9835c35
23 changed files with 29 additions and 68 deletions
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4
include/asm-m32r/setup.h
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@ -24,10 +24,6 @@
#define RAMDISK_PROMPT_FLAG (0x8000)
#define RAMDISK_LOAD_FLAG (0x4000)
#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
#define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
extern unsigned long memory_start;
extern unsigned long memory_end;