This is a note to let you know that I've just added the patch titled
tmpfs: ZERO_RANGE and COLLAPSE_RANGE not currently supported
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tmpfs-zero_range-and-collapse_range-not-currently-supported.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 13ace4d0d9db40e10ecd66dfda14e297571be813 Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hughd@xxxxxxxxxx>
Date: Mon, 23 Jun 2014 13:22:03 -0700
Subject: tmpfs: ZERO_RANGE and COLLAPSE_RANGE not currently supported
From: Hugh Dickins <hughd@xxxxxxxxxx>
commit 13ace4d0d9db40e10ecd66dfda14e297571be813 upstream.
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@xxxxxxxxxx>
Reviewed-by: Lukas Czerner <lczerner@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/shmem.c | 3 +++
1 file changed, 3 insertions(+)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1728,6 +1728,9 @@ static long shmem_fallocate(struct file
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) {
Patches currently in stable-queue which might be from hughd@xxxxxxxxxx are
queue-3.15/tmpfs-zero_range-and-collapse_range-not-currently-supported.patch
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