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Commit c907c55d authored by xiongxin's avatar xiongxin Committed by Greg Kroah-Hartman
Browse files

PM: hibernate: Fix mistake in kerneldoc comment 



[ Upstream commit 6e5d7300cbe7c3541bc31f16db3e9266e6027b4b ]

The actual maximum image size formula in hibernate_preallocate_memory()
is as follows:

max_size = (count - (size + PAGES_FOR_IO)) / 2
	    - 2 * DIV_ROUND_UP(reserved_size, PAGE_SIZE);

but the one in the kerneldoc comment of the function is different and
incorrect.

Fixes: ddeb6487 ("PM / Hibernate: Add sysfs knob to control size of memory for drivers")
Signed-off-by: default avatarxiongxin <xiongxin@kylinos.cn>
[ rjw: Subject and changelog rewrite ]
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent f0ff6c60

kernel/power/snapshot.c

+2 −2
Original line number Original line Diff line number Diff line
@@ -1680,8 +1680,8 @@ static unsigned long minimum_image_size(unsigned long saveable) 
 * /sys/power/reserved_size, respectively).  To make this happen, we compute the

 * /sys/power/reserved_size, respectively).  To make this happen, we compute the

 * total number of available page frames and allocate at least

 * total number of available page frames and allocate at least

 *

 *

 * ([page frames total] + PAGES_FOR_IO + [metadata pages]) / 2

 * ([page frames total] - PAGES_FOR_IO - [metadata pages]) / 2

 *  + 2 * DIV_ROUND_UP(reserved_size, PAGE_SIZE)

 *  - 2 * DIV_ROUND_UP(reserved_size, PAGE_SIZE)

 *

 *

 * of them, which corresponds to the maximum size of a hibernation image.

 * of them, which corresponds to the maximum size of a hibernation image.

 *

 *