[PATCH] PPC: Don't sleep in flush_dcache_icache_page()
From: Roland Dreier <hidden>
Date: 2005-08-16 21:06:55
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 <redacted>
diff --git a/arch/ppc/mm/init.c b/arch/ppc/mm/init.c
--- a/arch/ppc/mm/init.c
+++ b/arch/ppc/mm/init.c@@ -560,8 +560,16 @@ 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); + unsigned long flags; + void *start; + + local_irq_save(flags); + + start = kmap_atomic(page, KM_PPC_SYNC_PAGE); + __flush_dcache_icache(start); + kunmap_atomic(start, KM_PPC_SYNC_PAGE); + + local_irq_restore(flags); #elif CONFIG_8xx /* On 8xx there is no need to kmap since highmem is not supported */ __flush_dcache_icache(page_address(page));