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ntfs: Do not kmap pages used for reading from disk 

These pages are accessed through DMA and 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 20:53:56 +01:00 committed by Konstantin Komarov
parent 801f614ba2
commit 14656154d2
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1 changed files with 0 additions and 4 deletions
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4
fs/ntfs3/frecord.c
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@ -2590,7 +2590,6 @@ int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
}
pages_disk[i] = pg;
lock_page(pg);
kmap(pg);
}
/* Read 'ondisk_size' bytes from disk. */
@ -2640,7 +2639,6 @@ int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
for (i = 0; i < npages_disk; i++) {
pg = pages_disk[i];
if (pg) {
kunmap(pg);
unlock_page(pg);
put_page(pg);
}
@ -2735,7 +2733,6 @@ int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
}
pages_disk[i] = pg;
lock_page(pg);
kmap(pg);
}
/* To simplify compress algorithm do vmap for source and target pages. */
@ -2823,7 +2820,6 @@ int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
for (i = 0; i < pages_per_frame; i++) {
pg = pages_disk[i];
if (pg) {
kunmap(pg);
unlock_page(pg);
put_page(pg);
}