From 1c9d3df5e88ad7db23f5b22f4341c39722a904a4 Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Sat, 30 Dec 2006 16:08:50 +0100 Subject: [ARM] 4078/1: Fix ARM copypage cache coherency problems If PG_dcache_dirty is set for a page, we need to flush the source page before performing any copypage operation using a different virtual address. This fixes the copypage implementations for XScale, StrongARM and ARMv6. This patch fixes segmentation faults seen in the dynamic linker under the usage patterns in glibc 2.4/2.5. Signed-off-by: Richard Purdie Signed-off-by: Russell King --- include/asm-arm/cacheflush.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/asm-arm/cacheflush.h') diff --git a/include/asm-arm/cacheflush.h b/include/asm-arm/cacheflush.h index 378a3a2ce8d9..d51049522cd0 100644 --- a/include/asm-arm/cacheflush.h +++ b/include/asm-arm/cacheflush.h @@ -355,6 +355,8 @@ extern void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, */ extern void flush_dcache_page(struct page *); +extern void __flush_dcache_page(struct address_space *mapping, struct page *page); + #define flush_dcache_mmap_lock(mapping) \ write_lock_irq(&(mapping)->tree_lock) #define flush_dcache_mmap_unlock(mapping) \ -- cgit v1.2.2