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Btrfs: cut down stack usage in btree_write_cache_pages 

This adds noinline_for_stack to two helpers used by
btree_write_cache_pages.  It shaves us down from 424 bytes on the
stack to 280.

Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Chris Mason 2014-05-19 20:55:27 -07:00
parent d4452bc526
commit 0e378df15c
1 changed files with 5 additions and 4 deletions
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9
fs/btrfs/extent_io.c
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@ -3393,9 +3393,10 @@ void wait_on_extent_buffer_writeback(struct extent_buffer *eb)
TASK_UNINTERRUPTIBLE);
}
static int lock_extent_buffer_for_io(struct extent_buffer *eb,
struct btrfs_fs_info *fs_info,
struct extent_page_data *epd)
static noinline_for_stack int
lock_extent_buffer_for_io(struct extent_buffer *eb,
struct btrfs_fs_info *fs_info,
struct extent_page_data *epd)
{
unsigned long i, num_pages;
int flush = 0;
@ -3500,7 +3501,7 @@ static void end_bio_extent_buffer_writepage(struct bio *bio, int err)
bio_put(bio);
}
static int write_one_eb(struct extent_buffer *eb,
static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
struct btrfs_fs_info *fs_info,
struct writeback_control *wbc,
struct extent_page_data *epd)