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authorMatthew Wilcox <matthew@wil.cx>2009-06-17 02:32:45 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-17 06:47:41 +0400
commit31c911329e048b715a1dfeaaf617be9430fd7f4e (patch)
treea8eca5337528c21ab54ae5ad152d04a471b906cf /include/linux/highmem.h
parent69c854817566db82c362797b4a6521d0b00fe1d8 (diff)
downloadlinux-31c911329e048b715a1dfeaaf617be9430fd7f4e.tar.xz
mm: check the argument of kunmap on architectures without highmem
If you're using a non-highmem architecture, passing an argument with the wrong type to kunmap() doesn't give you a warning because the ifdef doesn't check the type. Using a static inline function solves the problem nicely. Reported-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/highmem.h')
-rw-r--r--include/linux/highmem.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 1fcb7126a01f..211ff4497269 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -55,7 +55,9 @@ static inline void *kmap(struct page *page)
return page_address(page);
}
-#define kunmap(page) do { (void) (page); } while (0)
+static inline void kunmap(struct page *page)
+{
+}
static inline void *kmap_atomic(struct page *page, enum km_type idx)
{