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authorOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>2007-07-16 09:40:05 +0900
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 10:31:01 -0700
commit98283bb49c6c8c070ebde9f47489d3e9a83c1323 (patch)
treef124325ac1768bee61b82e7689bc48ea102efe56 /arch/x86_64
parent347e03df1696ab22963f6b8c4f2220c41ec17f82 (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>
Diffstat (limited to 'arch/x86_64')
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