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[PATCH] ppc32: Don't sleep in flush_dcache_icache_page()

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flush_dcache_icache_page() will be called on an instruction page fault.  We
can't sleep in the fault handler, so use kmap_atomic() instead of just
kmap() for the Book-E case.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Acked-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roland Dreier 2005-09-03 15:55:43 -07:00 committed by Linus Torvalds
parent 656de7e469
commit 5a6a4d4320
2 changed files with 4 additions and 2 deletions
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5
arch/ppc/mm/init.c
View file

@ -560,8 +560,9 @@ void flush_dcache_page(struct page *page)
void flush_dcache_icache_page(struct page *page)
{
#ifdef CONFIG_BOOKE
__flush_dcache_icache(kmap(page));
kunmap(page);
void *start = kmap_atomic(page, KM_PPC_SYNC_ICACHE);
__flush_dcache_icache(start);
kunmap_atomic(start, KM_PPC_SYNC_ICACHE);
#elif CONFIG_8xx
/* On 8xx there is no need to kmap since highmem is not supported */
__flush_dcache_icache(page_address(page));

1
include/asm-ppc/kmap_types.h
View file

@ -17,6 +17,7 @@ enum km_type {
KM_SOFTIRQ0,
KM_SOFTIRQ1,
KM_PPC_SYNC_PAGE,
KM_PPC_SYNC_ICACHE,
KM_TYPE_NR
};