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btrfs: use clear_page where appropriate 

There's a helper to clear whole page, with a arch-specific optimized
code. The replaced cases do not seem to be in performace critical code,
but we still might get some percent gain.

Signed-off-by: David Sterba <dsterba@suse.com>
hifive-unleashed-5.1
David Sterba 2017-03-29 20:48:44 +02:00
parent e501bfe323
commit 619a974292
2 changed files with 2 additions and 2 deletions
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2
fs/btrfs/free-space-cache.c
View File

@ -355,7 +355,7 @@ static void io_ctl_map_page(struct btrfs_io_ctl *io_ctl, int clear)
io_ctl->orig = io_ctl->cur;
io_ctl->size = PAGE_SIZE;
if (clear)
memset(io_ctl->cur, 0, PAGE_SIZE);
clear_page(io_ctl->cur);
}
static void io_ctl_drop_pages(struct btrfs_io_ctl *io_ctl)

2
fs/btrfs/scrub.c
View File

@ -1643,7 +1643,7 @@ static int scrub_write_page_to_dev_replace(struct scrub_block *sblock,
if (spage->io_error) {
void *mapped_buffer = kmap_atomic(spage->page);
memset(mapped_buffer, 0, PAGE_SIZE);
clear_page(mapped_buffer);
flush_dcache_page(spage->page);
kunmap_atomic(mapped_buffer);
}