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Message-Id: <1302738328-22693-1-git-send-email-vapier@gentoo.org>
Date: Wed, 13 Apr 2011 19:45:28 -0400
From: Mike Frysinger <vapier@...too.org>
To: Arnd Bergmann <arnd@...db.de>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] asm-generic/cacheflush.h: flush icache when copying to user pages
The copy_to_user_page() function is supposed to flush the icache on the
memory that was written, but the current asm-generic version lacks that
logic. While normally it isn't a big deal as the asm-generic version of
icache flushing is a stub, it is a deal for ports that want to use the
asm-generic version as a baseline and then overlay its own specific parts
(like icache flushing).
Signed-off-by: Mike Frysinger <vapier@...too.org>
---
include/asm-generic/cacheflush.h | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/include/asm-generic/cacheflush.h b/include/asm-generic/cacheflush.h
index 57b5c3c..87bc536 100644
--- a/include/asm-generic/cacheflush.h
+++ b/include/asm-generic/cacheflush.h
@@ -24,7 +24,10 @@
#define flush_cache_vunmap(start, end) do { } while (0)
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
- memcpy(dst, src, len)
+ do { \
+ memcpy(dst, src, len); \
+ flush_icache_user_range(vma, page, vaddr, len); \
+ } while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
--
1.7.5.rc1
--
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