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tmpfs: ZERO_RANGE and COLLAPSE_RANGE not currently supported 

I was well aware of FALLOC_FL_ZERO_RANGE and FALLOC_FL_COLLAPSE_RANGE
support being added to fallocate(); but didn't realize until now that I
had been too stupid to future-proof shmem_fallocate() against new
additions.  -EOPNOTSUPP instead of going on to ordinary fallocation.

Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Cc: <stable@vger.kernel.org>	[3.15]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2014-06-23 13:22:03 -07:00 committed by Linus Torvalds
parent 7cdb0d25bc
commit 13ace4d0d9
1 changed files with 3 additions and 0 deletions
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3
mm/shmem.c
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@ -1724,6 +1724,9 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset,
pgoff_t start, index, end;
int error;
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
return -EOPNOTSUPP;
mutex_lock(&inode->i_mutex);
if (mode & FALLOC_FL_PUNCH_HOLE) {