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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-06-17 01:45:21 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-07-07 00:39:28 +0300 |
| commit | 687857930d9294100a4636e45b78a244e6ba4125 (patch) | |
| tree | f7929d352818e1d8a8b4cd2b9bcac07dbc92df50 | |
| parent | 6a799d3514217d217b4e74a1ee4f016428582dc5 (diff) | |
| download | linux-687857930d9294100a4636e45b78a244e6ba4125.tar.xz | |
ufs: ufs_trunc_...() has exclusion with everything that might cause allocations
Currently - on lock_ufs(), eventually - on per-inode mutex.
lock_ufs() used to be mere BKL, which is much weaker, so it needed
those rechecks. BKL doesn't provide any exclusion once we lose CPU;
its blind replacement, OTOH, _does_. Making that per-filesystem was
an atrocity, but at least we can simplify life here. And yes, we
certainly need to make that sucker per-inode - these days inode.c and
truncate.c uses are needed only to protect the block pointers.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/ufs/truncate.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c index c56f4ef1cb7a..3beaa848e30a 100644 --- a/fs/ufs/truncate.c +++ b/fs/ufs/truncate.c @@ -195,10 +195,6 @@ static int ufs_trunc_indirect(struct inode *inode, u64 offset, void *p) if (!tmp) return 0; ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize); - if (tmp != ufs_data_ptr_to_cpu(sb, p)) { - ubh_brelse (ind_ubh); - return 1; - } if (!ind_ubh) { write_seqlock(&UFS_I(inode)->meta_lock); ufs_data_ptr_clear(uspi, p); @@ -280,10 +276,6 @@ static int ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p) if (!tmp) return 0; dind_bh = ubh_bread(sb, tmp, uspi->s_bsize); - if (tmp != ufs_data_ptr_to_cpu(sb, p)) { - ubh_brelse (dind_bh); - return 1; - } if (!dind_bh) { write_seqlock(&UFS_I(inode)->meta_lock); ufs_data_ptr_clear(uspi, p); @@ -345,10 +337,6 @@ static int ufs_trunc_tindirect(struct inode *inode) if (!(tmp = ufs_data_ptr_to_cpu(sb, p))) return 0; tind_bh = ubh_bread (sb, tmp, uspi->s_bsize); - if (tmp != ufs_data_ptr_to_cpu(sb, p)) { - ubh_brelse (tind_bh); - return 1; - } if (!tind_bh) { write_seqlock(&ufsi->meta_lock); ufs_data_ptr_clear(uspi, p); |