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ARM: ZERO_PAGE: Avoid flush_dcache_page() for zero page

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The zero page is read-only, and has its cache state cleared during
boot.  No further maintanence for this page is required.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2009-10-25 10:23:04 +00:00
parent b7dc0b2cfc
commit 421fe93cc4
3 changed files with 18 additions and 2 deletions
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2
arch/arm/mm/mmu.c
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@ -1036,7 +1036,7 @@ void __init paging_init(struct machine_desc *mdesc)
*/
zero_page = alloc_bootmem_low_pages(PAGE_SIZE);
empty_zero_page = virt_to_page(zero_page);
flush_dcache_page(empty_zero_page);
__flush_dcache_page(NULL, empty_zero_page);
}
/*