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authorRafael J. Wysocki <rjw@sisk.pl>2010-09-20 19:44:38 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2010-10-17 01:57:42 +0200
commit266f1a25eff5ff98c498d7754a419aacfd88f71c (patch)
tree1666c23a92f3845be4644dc26728574119ca61f9
parentbcb5ba8b4e8a5ae14b27351bdf499dd4c3bcc944 (diff)
PM / Hibernate: Improve comments in hibernate_preallocate_memory()
One comment in hibernate_preallocate_memory() is wrong, so fix it and add one more comment to clarify the meaning of the fixed one. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
-rw-r--r--kernel/power/snapshot.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index d3f795f01bbc..d9191b40cf6e 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -1318,12 +1318,14 @@ int hibernate_preallocate_memory(void)
/* Compute the maximum number of saveable pages to leave in memory. */
max_size = (count - (size + PAGES_FOR_IO)) / 2 - 2 * SPARE_PAGES;
+ /* Compute the desired number of image pages specified by image_size. */
size = DIV_ROUND_UP(image_size, PAGE_SIZE);
if (size > max_size)
size = max_size;
/*
- * If the maximum is not less than the current number of saveable pages
- * in memory, allocate page frames for the image and we're done.
+ * If the desired number of image pages is at least as large as the
+ * current number of saveable pages in memory, allocate page frames for
+ * the image and we're done.
*/
if (size >= saveable) {
pages = preallocate_image_highmem(save_highmem);