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| author | Eric Biggers <ebiggers@google.com> | 2020-03-07 19:27:01 -0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-03-14 11:55:08 +0100 |
| commit | fba616a49fe8929f4b4066f4384039db274cb73e (patch) | |
| tree | a94d214f728ba0993696b30d1982399a2a11334b /kernel/power | |
| parent | 51995ff51231f1502987e18ba6820a55a422b684 (diff) | |
| download | linux-fba616a49fe8929f4b4066f4384039db274cb73e.tar.bz2 | |
PM / hibernate: Remove unnecessary compat ioctl overrides
Since the SNAPSHOT_GET_IMAGE_SIZE, SNAPSHOT_AVAIL_SWAP_SIZE, and
SNAPSHOT_ALLOC_SWAP_PAGE ioctls produce an loff_t result, and loff_t is
always 64-bit even in the compat case, there's no reason to have the
special compat handling for these ioctls. Just remove this unneeded
code so that these ioctls call into snapshot_ioctl() directly, doing
just the compat_ptr() conversion on the argument.
(This unnecessary code was also causing a KMSAN false positive.)
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/user.c | 16 |
1 files changed, 1 insertions, 15 deletions
diff --git a/kernel/power/user.c b/kernel/power/user.c index 77438954cc2b..58ed9478787f 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -409,21 +409,7 @@ snapshot_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) switch (cmd) { case SNAPSHOT_GET_IMAGE_SIZE: case SNAPSHOT_AVAIL_SWAP_SIZE: - case SNAPSHOT_ALLOC_SWAP_PAGE: { - compat_loff_t __user *uoffset = compat_ptr(arg); - loff_t offset; - mm_segment_t old_fs; - int err; - - old_fs = get_fs(); - set_fs(KERNEL_DS); - err = snapshot_ioctl(file, cmd, (unsigned long) &offset); - set_fs(old_fs); - if (!err && put_user(offset, uoffset)) - err = -EFAULT; - return err; - } - + case SNAPSHOT_ALLOC_SWAP_PAGE: case SNAPSHOT_CREATE_IMAGE: return snapshot_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |