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[PATCH] mm: remove PG_highmem

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Remove PG_highmem, to save a page flag.  Use is_highmem() instead.  It'll
generate a little more code, but we don't use PageHigheMem() in many places.

Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Badari Pulavarty 2005-06-21 17:14:52 -07:00 • committed by Linus Torvalds
parent 73219d1780
commit cbe37d0937
7 changed files with 13 additions and 20 deletions
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27
include/linux/page-flags.h
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@ -61,21 +61,20 @@
#define PG_active 6
#define PG_slab 7 /* slab debug (Suparna wants this) */
#define PG_highmem 8
#define PG_checked 9 /* kill me in 2.5.<early>. */
#define PG_arch_1 10
#define PG_reserved 11
#define PG_checked 8 /* kill me in 2.5.<early>. */
#define PG_arch_1 9
#define PG_reserved 10
#define PG_private 11 /* Has something at ->private */
#define PG_private 12 /* Has something at ->private */
#define PG_writeback 13 /* Page is under writeback */
#define PG_nosave 14 /* Used for system suspend/resume */
#define PG_compound 15 /* Part of a compound page */
#define PG_writeback 12 /* Page is under writeback */
#define PG_nosave 13 /* Used for system suspend/resume */
#define PG_compound 14 /* Part of a compound page */
#define PG_swapcache 15 /* Swap page: swp_entry_t in private */
#define PG_swapcache 16 /* Swap page: swp_entry_t in private */
#define PG_mappedtodisk 17 /* Has blocks allocated on-disk */
#define PG_reclaim 18 /* To be reclaimed asap */
#define PG_nosave_free 19 /* Free, should not be written */
#define PG_uncached 20 /* Page has been mapped as uncached */
#define PG_mappedtodisk 16 /* Has blocks allocated on-disk */
#define PG_reclaim 17 /* To be reclaimed asap */
#define PG_nosave_free 18 /* Free, should not be written */
#define PG_uncached 19 /* Page has been mapped as uncached */
/*
* Global page accounting. One instance per CPU. Only unsigned longs are
@ -215,7 +214,7 @@ extern void __mod_page_state(unsigned offset, unsigned long delta);
#define TestSetPageSlab(page) test_and_set_bit(PG_slab, &(page)->flags)
#ifdef CONFIG_HIGHMEM
#define PageHighMem(page) test_bit(PG_highmem, &(page)->flags)
#define PageHighMem(page) is_highmem(page_zone(page))
#else
#define PageHighMem(page) 0 /* needed to optimize away at compile time */
#endif