[PATCH -suspend] Hibernate: Replace unnecessary evaluation of pfn_to_page()

From: Rafael J. Wysocki
Date: Sun Dec 07 2008 - 18:53:27 EST

From: Rafael J. Wysocki <rjw@xxxxxxx>
Subject: Hibernate: Replace unnecessary evaluation of pfn_to_page()

Replace one evaluation of pfn_to_page() in copy_data_pages() with
the value of a local variable containing the right number already.

Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
kernel/power/snapshot.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6/kernel/power/snapshot.c
--- linux-2.6.orig/kernel/power/snapshot.c
+++ linux-2.6/kernel/power/snapshot.c
@@ -981,7 +981,7 @@ static void copy_data_page(unsigned long
* data modified by kmap_atomic()
safe_copy_page(buffer, s_page);
- dst = kmap_atomic(pfn_to_page(dst_pfn), KM_USER0);
+ dst = kmap_atomic(d_page, KM_USER0);
memcpy(dst, buffer, PAGE_SIZE);
kunmap_atomic(dst, KM_USER0);
} else {
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