The patch titled
tty: drop the BKL for driver/ldisc ioctl methods
has been added to the -mm tree. Its filename is
tty-drop-the-bkl-for-driver-ldisc-ioctl-methods.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: tty: drop the BKL for driver/ldisc ioctl methods
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Now we have pushed the lock down we can stop wrapping the call with a lock in
the tty layer.
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/char/tty_io.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff -puN drivers/char/tty_io.c~tty-drop-the-bkl-for-driver-ldisc-ioctl-methods drivers/char/tty_io.c
--- a/drivers/char/tty_io.c~tty-drop-the-bkl-for-driver-ldisc-ioctl-methods
+++ a/drivers/char/tty_io.c
@@ -3459,11 +3459,8 @@ long tty_ioctl(struct file *file, unsign
switch (cmd) {
case TIOCSBRK:
case TIOCCBRK:
- if (tty->driver->ioctl) {
- lock_kernel();
+ if (tty->driver->ioctl)
retval = tty->driver->ioctl(tty, file, cmd, arg);
- unlock_kernel();
- }
return retval;
/* These two ioctl's always return success; even if */
@@ -3584,18 +3581,14 @@ long tty_ioctl(struct file *file, unsign
break;
}
if (tty->driver->ioctl) {
- lock_kernel();
retval = (tty->driver->ioctl)(tty, file, cmd, arg);
- unlock_kernel();
if (retval != -ENOIOCTLCMD)
return retval;
}
ld = tty_ldisc_ref_wait(tty);
retval = -EINVAL;
if (ld->ioctl) {
- lock_kernel();
retval = ld->ioctl(tty, file, cmd, arg);
- unlock_kernel();
if (retval == -ENOIOCTLCMD)
retval = -EINVAL;
}
_
Patches currently in -mm which might be from alan@xxxxxxxxxxxxxxxxxxx are
add-time_is_after_jiffies-and-others-which-compare-with-jiffies.patch
git-libata-all.patch
libata-isolate-and-rework-cable-logic.patch
devres-implement-pcim_iomap_regions_request_all-fix.patch
devres-implement-pcim_iomap_regions_request_all-fix-fix.patch
pata_atiixp-simplex-clear.patch
pata_amd-fix-sparse-warning.patch
8390-split-8390-support-into-a-pausing-and-a-non-pausing-driver-core.patch
8390-split-8390-support-into-a-pausing-and-a-non-pausing-driver-core-fix.patch
parisc-new-termios-definitions.patch
crisv10-prepare-for-bkl-push-down.patch
fix-tty-speed-handling-on-8250.patch
uart_get_baud_rate-stop-mangling-termios.patch
serial-8250-tighten-test-for-using-backup-timer.patch
do_task_stat-dont-take-rcu_read_lock.patch
amiserial-prepare-for-locking-relaxation-in-caller.patch
cyclades-prepare-for-relaxed-locking-in-callers.patch
epca-lock_kernel-push-down.patch
esp-lock_kernel-push-down.patch
isicom-prepare-for-lock_kernel-push-down.patch
isicom-istallion-prepare-for-lock_kernel-pushdown.patch
mxser-prepare-for-bkl-pushdown.patch
riscom8-prepare-for-bkl-pushdown.patch
rocket-prepare-for-bkl-pushdown.patch
serial167-prepare-to-push-bkl-down-into-drivers.patch
specialix-prepare-for-bkl-pushdown.patch
stallion-prepare-for-bkl-push-down.patch
sx-prepare-for-bkl-pushdown.patch
synclink-series-prepare-for-bkl-pushdown.patch
viocons-bkl-locking.patch
vt_ioctl-prepare-for-bkl-push-down.patch
isdn_tty-prepare-for-bkl-push-down.patch
68360serial-note-that-there-isnt-any-info-mcr-locking.patch
serial_core-prepare-for-bkl-push-down.patch
tty-bkl-pushdown.patch
tty-bkl-pushdown-fix1.patch
redo-locking-of-tty-pgrp.patch
resume-tty-on-susp-and-fix-crnl-order-in-n_tty-line-discipline.patch
tty_io-fix-remaining-pid-struct-locking.patch
tty_io-fix-remaining-pid-struct-locking-small-cleanup.patch
tty_ioctl-locking-for-tty_wait_until_sent.patch
tty_ioctl-soft-carrier-handling.patch
tty-drop-the-bkl-for-driver-ldisc-ioctl-methods.patch
sxc-fix-printk-warnings-on-sparc32.patch
istallion-tiocg-ssoftcar-handling-removal.patch
edac-new-support-for-intel-3100-chipset.patch
edac-fix-module-initialization-on-several-modules.patch
edac-add-e752x-parameter-for-sysbus_parity-selection.patch
edac-add-e752x-parameter-for-sysbus_parity-selection-checkpatch-fixes.patch
put_pid-make-sure-we-dont-free-the-live-pid.patch
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