From 844b43adba74d97f15e56b103c97bfcccaa01aa6 Mon Sep 17 00:00:00 2001 From: Carmelo Amoroso Date: Mon, 7 Jan 2008 13:50:18 +0900 Subject: [PATCH] sh: Fix argument page dcache flushing regression. In the do_execve() path, argument page handling used to explicitly call flush_dcache_page() for each page, this has since been reworked and uses flush_kernel_dcache_page() instead, which is presently a nop. Doing a simple modprobe/rmmod in a loop under busybox consistently manages to crash without providing a sane flush_kernel_dcache_page() implementation, so, plug in a simple implementation. Signed-off-by: Carmelo Amoroso Signed-off-by: Paul Mundt --- include/asm-sh/cacheflush.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/asm-sh/cacheflush.h b/include/asm-sh/cacheflush.h index 9d528ada3c14..e034c3604111 100644 --- a/include/asm-sh/cacheflush.h +++ b/include/asm-sh/cacheflush.h @@ -43,6 +43,12 @@ extern void __flush_purge_region(void *start, int size); extern void __flush_invalidate_region(void *start, int size); #endif +#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE +static inline void flush_kernel_dcache_page(struct page *page) +{ + flush_dcache_page(page); +} + #if defined(CONFIG_CPU_SH4) && !defined(CONFIG_CACHE_OFF) extern void copy_to_user_page(struct vm_area_struct *vma, struct page *page, unsigned long vaddr, void *dst, const void *src, -- 2.30.2