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ntfs: Do not kmap page cache pages for compression

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These pages are accessed through vmap; they are not accessed
by calling page_address(), so they do not need to be kmapped.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Matthew Wilcox (Oracle) 2025-07-18 20:53:57 +01:00 committed by Konstantin Komarov
parent 14656154d2
commit 953b79a7a1
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GPG Key ID: A9B0331F832407B6
1 changed files with 0 additions and 11 deletions
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11
fs/ntfs3/frecord.c
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@ -2407,9 +2407,6 @@ int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
* To simplify decompress algorithm do vmap for source
* and target pages.
*/
for (i = 0; i < pages_per_frame; i++)
kmap(pages[i]);
frame_size = pages_per_frame << PAGE_SHIFT;
frame_mem = vmap(pages, pages_per_frame, VM_MAP, PAGE_KERNEL);
if (!frame_mem) {
@ -2655,7 +2652,6 @@ int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
out:
for (i = 0; i < pages_per_frame; i++) {
pg = pages[i];
kunmap(pg);
SetPageUptodate(pg);
}
@ -2742,9 +2738,6 @@ int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
goto out1;
}
for (i = 0; i < pages_per_frame; i++)
kmap(pages[i]);
/* Map in-memory frame for read-only. */
frame_mem = vmap(pages, pages_per_frame, VM_MAP, PAGE_KERNEL_RO);
if (!frame_mem) {
@ -2810,11 +2803,7 @@ int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
out3:
vunmap(frame_mem);
out2:
for (i = 0; i < pages_per_frame; i++)
kunmap(pages[i]);
vunmap(frame_ondisk);
out1:
for (i = 0; i < pages_per_frame; i++) {