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| author | Christoph Hellwig <hch@infradead.org> | 2011-06-24 14:29:40 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-07-20 20:47:44 -0400 |
| commit | 582686915803e34adc8fdcd90bff7ca7f6a42221 (patch) | |
| tree | 5a522cb6dbc41eaac987dbf15a2cbae35b2544cc /fs/fat/file.c | |
| parent | 8c5dc70aae29d2571c0f461d69b37e4e6e01ff4c (diff) | |
| download | linux-582686915803e34adc8fdcd90bff7ca7f6a42221.tar.bz2 | |
fat: remove i_alloc_sem abuse
Add a new rw_semaphore to protect bmap against truncate. Previous
i_alloc_sem was abused for this, but it's going away in this series.
Note that we can't simply use i_mutex, given that the swapon code
calls ->bmap under it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/fat/file.c')
| -rw-r--r-- | fs/fat/file.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/fat/file.c b/fs/fat/file.c index 7018e1d8902d..a4a3a3c06436 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -429,8 +429,10 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr) } if (attr->ia_valid & ATTR_SIZE) { + down_write(&MSDOS_I(inode)->truncate_lock); truncate_setsize(inode, attr->ia_size); fat_truncate_blocks(inode, attr->ia_size); + up_write(&MSDOS_I(inode)->truncate_lock); } setattr_copy(inode, attr); |