The patch titled
Subject: ipc: shm: shm_fallocate use -ENOTSUPP
has been added to the -mm tree. Its filename is
ipc-shm-restore-madv_remove-functionality-on-shared-memory-segments-fix.patch
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------------------------------------------------------
From: Hugh Dickins <hughd@xxxxxxxxxx>
Subject: ipc: shm: shm_fallocate use -ENOTSUPP
When underlying filesystem (i.e. hugetlbfs) does not support fallocate(),
let shm_fallocate() fail with -EOPNOTSUPP rather than -EINVAL: so that
madvise(,,MADV_REMOVE) gives the same error as it does wherever else
fallocate() is unsupported. vmtruncate_range() gave -ENOSYS in this case,
but that was not quite right.
Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
ipc/shm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN ipc/shm.c~ipc-shm-restore-madv_remove-functionality-on-shared-memory-segments-fix ipc/shm.c
--- a/ipc/shm.c~ipc-shm-restore-madv_remove-functionality-on-shared-memory-segments-fix
+++ a/ipc/shm.c
@@ -399,7 +399,7 @@ static long shm_fallocate(struct file *f
struct shm_file_data *sfd = shm_file_data(file);
if (!sfd->file->f_op->fallocate)
- return -EINVAL;
+ return -EOPNOTSUPP;
return sfd->file->f_op->fallocate(file, mode, offset, len);
}
_
Subject: Subject: ipc: shm: shm_fallocate use -ENOTSUPP
Patches currently in -mm which might be from hughd@xxxxxxxxxx are
origin.patch
linux-next.patch
shmem-replace_page-must-flush_dcache-and-others.patch
ipc-shm-restore-madv_remove-functionality-on-shared-memory-segments.patch
ipc-shm-restore-madv_remove-functionality-on-shared-memory-segments-fix.patch
mm-correctly-synchronize-rss-counters-at-exit-exec.patch
tmpfs-implement-numa-node-interleaving.patch
tmpfs-implement-numa-node-interleaving-fix.patch
memcg-rename-mem_cgroup_stat_swapout-as-mem_cgroup_stat_swap.patch
memcg-remove-mem_cgroup_charge_type_force.patch
documentation-update-how-page-cluster-affects-swap-i-o.patch
prio_tree-debugging-patch.patch
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