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btrfs: remove redundant calls to flush_dcache_page 

Both memzero_page and memcpy_to_page already call flush_dcache_page so
we can remove the calls from btrfs code.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2022-06-01 13:47:54 +02:00
parent bd8f7e6277
commit 21a8935ead
4 changed files with 4 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/btrfs/compression.c
View File

@ -760,7 +760,6 @@ static noinline int add_ra_bio_pages(struct inode *inode,
int zeros;
zeros = PAGE_SIZE - zero_offset;
memzero_page(page, zero_offset, zeros);
flush_dcache_page(page);
}
}
@ -1476,7 +1475,6 @@ int btrfs_decompress_buf2page(const char *buf, u32 buf_len,
ASSERT(copy_start - decompressed < buf_len);
memcpy_to_page(bvec.bv_page, bvec.bv_offset,
buf + copy_start - decompressed, copy_len);
flush_dcache_page(bvec.bv_page);
cur_offset += copy_len;
bio_advance(orig_bio, copy_len);

7
fs/btrfs/extent_io.c
View File

@ -3641,7 +3641,6 @@ static int btrfs_do_readpage(struct page *page, struct extent_map **em_cached,
if (zero_offset) {
iosize = PAGE_SIZE - zero_offset;
memzero_page(page, zero_offset, iosize);
flush_dcache_page(page);
}
}
begin_page_read(fs_info, page);
@ -3656,7 +3655,6 @@ static int btrfs_do_readpage(struct page *page, struct extent_map **em_cached,
iosize = PAGE_SIZE - pg_offset;
memzero_page(page, pg_offset, iosize);
flush_dcache_page(page);
set_extent_uptodate(tree, cur, cur + iosize - 1,
&cached, GFP_NOFS);
unlock_extent_cached(tree, cur,
@ -3740,7 +3738,6 @@ static int btrfs_do_readpage(struct page *page, struct extent_map **em_cached,
struct extent_state *cached = NULL;
memzero_page(page, pg_offset, iosize);
flush_dcache_page(page);
set_extent_uptodate(tree, cur, cur + iosize - 1,
&cached, GFP_NOFS);
@ -4158,10 +4155,8 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
return 0;
}
if (page->index == end_index) {
if (page->index == end_index)
memzero_page(page, pg_offset, PAGE_SIZE - pg_offset);
flush_dcache_page(page);
}
ret = set_page_extent_mapped(page);
if (ret < 0) {

6
fs/btrfs/inode.c
View File

@ -4873,7 +4873,6 @@ again:
else
memzero_page(page, (block_start - page_offset(page)) + offset,
len);
flush_dcache_page(page);
}
btrfs_page_clear_checked(fs_info, page, block_start,
block_end + 1 - block_start);
@ -8598,10 +8597,9 @@ again:
else
zero_start = PAGE_SIZE;
if (zero_start != PAGE_SIZE) {
if (zero_start != PAGE_SIZE)
memzero_page(page, zero_start, PAGE_SIZE - zero_start);
flush_dcache_page(page);
}
btrfs_page_clear_checked(fs_info, page, page_start, PAGE_SIZE);
btrfs_page_set_dirty(fs_info, page, page_start, end + 1 - page_start);
btrfs_page_set_uptodate(fs_info, page, page_start, end + 1 - page_start);

5
fs/btrfs/reflink.c
View File

@ -110,7 +110,6 @@ static int copy_inline_to_page(struct btrfs_inode *inode,
if (comp_type == BTRFS_COMPRESS_NONE) {
memcpy_to_page(page, offset_in_page(file_offset), data_start,
datal);
flush_dcache_page(page);
} else {
ret = btrfs_decompress(comp_type, data_start, page,
offset_in_page(file_offset),
@ -132,10 +131,8 @@ static int copy_inline_to_page(struct btrfs_inode *inode,
*
* So what's in the range [500, 4095] corresponds to zeroes.
*/
if (datal < block_size) {
if (datal < block_size)
memzero_page(page, datal, block_size - datal);
flush_dcache_page(page);
}
btrfs_page_set_uptodate(fs_info, page, file_offset, block_size);
btrfs_page_clear_checked(fs_info, page, file_offset, block_size);