The patch titled serial_core: Prepare for BKL push down has been added to the -mm tree. Its filename is serial_core-prepare-for-bkl-push-down.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** 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: serial_core: Prepare for BKL push down From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> Instead of checking for the BKL in these methods, take it ourselves. That avoids propogating it into the serial drivers and we can then fix them later on. Signed-off-by: Alan Cox <alan@xxxxxxxxxx> Cc: Russell King <rmk@xxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/serial/serial_core.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff -puN drivers/serial/serial_core.c~serial_core-prepare-for-bkl-push-down drivers/serial/serial_core.c --- a/drivers/serial/serial_core.c~serial_core-prepare-for-bkl-push-down +++ a/drivers/serial/serial_core.c @@ -914,14 +914,14 @@ static void uart_break_ctl(struct tty_st struct uart_state *state = tty->driver_data; struct uart_port *port = state->port; - BUG_ON(!kernel_locked()); - + lock_kernel(); mutex_lock(&state->mutex); if (port->type != PORT_UNKNOWN) port->ops->break_ctl(port, break_state); mutex_unlock(&state->mutex); + unlock_kernel(); } static int uart_do_autoconfig(struct uart_state *state) @@ -1059,7 +1059,7 @@ static int uart_get_count(struct uart_st } /* - * Called via sys_ioctl under the BKL. We can use spin_lock_irq() here. + * Called via sys_ioctl. We can use spin_lock_irq() here. */ static int uart_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd, @@ -1069,8 +1069,8 @@ uart_ioctl(struct tty_struct *tty, struc void __user *uarg = (void __user *)arg; int ret = -ENOIOCTLCMD; - BUG_ON(!kernel_locked()); + lock_kernel(); /* * These ioctls don't rely on the hardware to be present. */ @@ -1143,6 +1143,7 @@ uart_ioctl(struct tty_struct *tty, struc out_up: mutex_unlock(&state->mutex); out: + unlock_kernel(); return ret; } @@ -1153,7 +1154,6 @@ static void uart_set_termios(struct tty_ unsigned long flags; unsigned int cflag = tty->termios->c_cflag; - BUG_ON(!kernel_locked()); /* * These are the bits that are used to setup various @@ -1165,9 +1165,11 @@ static void uart_set_termios(struct tty_ if ((cflag ^ old_termios->c_cflag) == 0 && tty->termios->c_ospeed == old_termios->c_ospeed && tty->termios->c_ispeed == old_termios->c_ispeed && - RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0) + RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0) { return; + } + lock_kernel(); uart_change_speed(state, old_termios); /* Handle transition to B0 status */ @@ -1200,7 +1202,7 @@ static void uart_set_termios(struct tty_ } spin_unlock_irqrestore(&state->port->lock, flags); } - + unlock_kernel(); #if 0 /* * No need to wake up processes in open wait, since they _ Patches currently in -mm which might be from alan@xxxxxxxxxxxxxxxxxxx are origin.patch libata-isolate-and-rework-cable-logic.patch pata_amd-fix-sparse-warning.patch 8390-split-8390-support-into-a-pausing-and-a-non-pausing-driver-core.patch parisc-new-termios-definitions.patch megaraid-outb_p-extermination.patch usb-serial-prepare-for-bkl-push-down.patch ftdi_sio-note-missing-locking.patch usb-serial-note-mos7480-and-option-dont-lock-modem-status.patch io_ti-lock-mcr-and-msr-shadows-properly.patch iuu_phoenix-lock-priv-tiostatus-properly.patch kobil_sct-get-rid-of-unneeded-priv-line_state.patch ti_usb_3410_5052-extend-locking-to-msr-and-shadow-mcr.patch git-watchdog.patch crisv10-prepare-for-bkl-push-down.patch fix-tty-speed-handling-on-8250.patch uart_get_baud_rate-stop-mangling-termios.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 nozomi-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 put_pid-make-sure-we-dont-free-the-live-pid.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html