| commit | 98283bb49c6c8c070ebde9f47489d3e9a83c1323 | [log] [tgz] |
|---|---|---|
| author | OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> | Mon Jul 16 09:40:05 2007 +0900 |
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | Mon Jul 16 10:31:01 2007 -0700 |
| tree | f124325ac1768bee61b82e7689bc48ea102efe56 | |
| parent | 347e03df1696ab22963f6b8c4f2220c41ec17f82 [diff] |
fat: Fix the race of read/write the FAT12 entry FAT12 entry is 12bits, so it needs 2 phase to update the value. And writer and reader access it without any lock, so reader can get the half updated value. This fixes the long standing race condition by adding a global spinlock to only FAT12 for avoiding any impact against FAT16/32. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>