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x86-32: remove ALLOCATOR_SLOP from head_32.S

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Impact: cleanup

ALLOCATOR_SLOP is a vestigial remain from when we used the
bootmem allocator to allocate the kernel's linear memory mapping.
Now we directly reserve pages from the e820 mapping, and no
longer require secondary structures to keep track of allocated
pages.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Jeremy Fitzhardinge 2009-03-16 12:10:07 -07:00 committed by H. Peter Anvin
parent c090f532db
commit b8a22a6273
1 changed files with 1 additions and 2 deletions
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3
arch/x86/kernel/head_32.S
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@ -58,7 +58,6 @@
#else #else
#define PAGE_TABLE_SIZE(pages) ((pages) / PTRS_PER_PGD) #define PAGE_TABLE_SIZE(pages) ((pages) / PTRS_PER_PGD)
#endif #endif
ALLOCATOR_SLOP = 4
/* Enough space to fit pagetables for the low memory linear map */ /* Enough space to fit pagetables for the low memory linear map */
MAPPING_BEYOND_END = (PAGE_TABLE_SIZE(1 << (32 - PAGE_SHIFT)) * PAGE_SIZE) MAPPING_BEYOND_END = (PAGE_TABLE_SIZE(1 << (32 - PAGE_SHIFT)) * PAGE_SIZE)
@ -70,7 +69,7 @@ MAPPING_BEYOND_END = (PAGE_TABLE_SIZE(1 << (32 - PAGE_SHIFT)) * PAGE_SIZE)
*/ */
KERNEL_PAGES = (KERNEL_IMAGE_SIZE + MAPPING_BEYOND_END)>>PAGE_SHIFT KERNEL_PAGES = (KERNEL_IMAGE_SIZE + MAPPING_BEYOND_END)>>PAGE_SHIFT
INIT_MAP_SIZE = (PAGE_TABLE_SIZE(KERNEL_PAGES) + ALLOCATOR_SLOP) * PAGE_SIZE_asm INIT_MAP_SIZE = PAGE_TABLE_SIZE(KERNEL_PAGES) * PAGE_SIZE_asm
RESERVE_BRK(pagetables, INIT_MAP_SIZE) RESERVE_BRK(pagetables, INIT_MAP_SIZE)
/* /*