diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2018-08-17 15:44:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-17 16:20:27 -0700 |
| commit | a10dcebacdb0cf6eb29c211e99cf190cd131a16a (patch) | |
| tree | d85f53c3e3582e99406da0fee740c63d791971f1 /fs/ntfs | |
| parent | bed95c43c15eb6b1ccc5b09e5ae08cac726c456d (diff) | |
| download | lwn-a10dcebacdb0cf6eb29c211e99cf190cd131a16a.tar.gz lwn-a10dcebacdb0cf6eb29c211e99cf190cd131a16a.zip | |
fs/ntfs/aops.c: don't disable interrupts during kmap_atomic()
ntfs_end_buffer_async_read() disables interrupts around kmap_atomic().
This is a leftover from the old kmap_atomic() implementation which
relied on fixed mapping slots, so the caller had to make sure that the
same slot could not be reused from an interrupting context.
kmap_atomic() was changed to dynamic slots long ago and commit
1ec9c5ddc17a ("include/linux/highmem.h: remove the second argument of
k[un]map_atomic()") removed the slot assignements, but the callers were
not checked for now redundant interrupt disabling.
Remove the conditional interrupt disable.
Link: http://lkml.kernel.org/r/20180611144913.gln5mklhqcrfsoom@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Anton Altaparmakov <anton@tuxera.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ntfs')
| -rw-r--r-- | fs/ntfs/aops.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c index 3a2e509c77c5..01c770979921 100644 --- a/fs/ntfs/aops.c +++ b/fs/ntfs/aops.c @@ -93,13 +93,11 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) ofs = 0; if (file_ofs < init_size) ofs = init_size - file_ofs; - local_irq_save(flags); kaddr = kmap_atomic(page); memset(kaddr + bh_offset(bh) + ofs, 0, bh->b_size - ofs); flush_dcache_page(page); kunmap_atomic(kaddr); - local_irq_restore(flags); } } else { clear_buffer_uptodate(bh); @@ -146,13 +144,11 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) recs = PAGE_SIZE / rec_size; /* Should have been verified before we got here... */ BUG_ON(!recs); - local_irq_save(flags); kaddr = kmap_atomic(page); for (i = 0; i < recs; i++) post_read_mst_fixup((NTFS_RECORD*)(kaddr + i * rec_size), rec_size); kunmap_atomic(kaddr); - local_irq_restore(flags); flush_dcache_page(page); if (likely(page_uptodate && !PageError(page))) SetPageUptodate(page); |