diff options
| author | Christoph Hellwig <hch@tuxera.com> | 2010-10-01 05:45:20 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2010-10-01 05:45:20 +0200 |
| commit | 84adede31267af37141da2b2b04293c5ea8af7ae (patch) | |
| tree | 41c1a3e28fab11baca330232bacbff3085afde82 /fs/hfsplus/wrapper.c | |
| parent | hfsplus: add per-superblock lock for volume header updates (diff) | |
| download | linux-84adede31267af37141da2b2b04293c5ea8af7ae.tar.xz linux-84adede31267af37141da2b2b04293c5ea8af7ae.zip | |
hfsplus: use atomic bitops for the superblock flags
The flags in the HFS+-specific superlock do get modified during runtime,
use atomic bitops to make the modifications SMP safe.
Signed-off-by: Christoph Hellwig <hch@tuxera.com>
Diffstat (limited to 'fs/hfsplus/wrapper.c')
| -rw-r--r-- | fs/hfsplus/wrapper.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/fs/hfsplus/wrapper.c b/fs/hfsplus/wrapper.c index c89e198e8a2a..8972c20b3216 100644 --- a/fs/hfsplus/wrapper.c +++ b/fs/hfsplus/wrapper.c @@ -123,7 +123,7 @@ int hfsplus_read_wrapper(struct super_block *sb) if (vhdr->signature == cpu_to_be16(HFSPLUS_VOLHEAD_SIG)) break; if (vhdr->signature == cpu_to_be16(HFSPLUS_VOLHEAD_SIGX)) { - sbi->flags |= HFSPLUS_SB_HFSX; + set_bit(HFSPLUS_SB_HFSX, &sbi->flags); break; } brelse(bh); @@ -169,10 +169,14 @@ int hfsplus_read_wrapper(struct super_block *sb) return -EIO; /* should still be the same... */ - if (vhdr->signature != (sbi->flags & HFSPLUS_SB_HFSX ? - cpu_to_be16(HFSPLUS_VOLHEAD_SIGX) : - cpu_to_be16(HFSPLUS_VOLHEAD_SIG))) - goto error; + if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) { + if (vhdr->signature != cpu_to_be16(HFSPLUS_VOLHEAD_SIGX)) + goto error; + } else { + if (vhdr->signature != cpu_to_be16(HFSPLUS_VOLHEAD_SIG)) + goto error; + } + sbi->s_vhbh = bh; sbi->s_vhdr = vhdr; |