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authorChristoph Hellwig <hch@tuxera.com>2010-10-01 05:45:20 +0200
committerChristoph Hellwig <hch@lst.de>2010-10-01 05:45:20 +0200
commit84adede31267af37141da2b2b04293c5ea8af7ae (patch)
tree41c1a3e28fab11baca330232bacbff3085afde82 /fs/hfsplus/wrapper.c
parent7ac9fb9c2a50963b699b3548e6f00698c1554dc6 (diff)
downloadop-kernel-dev-84adede31267af37141da2b2b04293c5ea8af7ae.zip
op-kernel-dev-84adede31267af37141da2b2b04293c5ea8af7ae.tar.gz
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.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/fs/hfsplus/wrapper.c b/fs/hfsplus/wrapper.c
index c89e198..8972c20 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;
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