diff options
| author | Alan Cox <alan@linux.intel.com> | 2010-06-01 22:52:54 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 13:47:41 -0700 |
| commit | e33ac1c10b6baaac68d18d931e120d8b96e8c5f8 (patch) | |
| tree | e39049f7e17546c3ad9dd90d739b6259826330d2 /drivers | |
| parent | d87d9b7d19f04b16c4406d3c0feeca10090e0ada (diff) | |
vc: Locking clean up
The virtual console layer uses the BKL for various things that don't really
need it. Clean them out.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/selection.c | 4 | ||||
| -rw-r--r-- | drivers/char/vt.c | 7 |
2 files changed, 8 insertions, 3 deletions
diff --git a/drivers/char/selection.c b/drivers/char/selection.c index f97b9e84806..6e79340d732 100644 --- a/drivers/char/selection.c +++ b/drivers/char/selection.c @@ -26,6 +26,7 @@ #include <linux/selection.h> #include <linux/tiocl.h> #include <linux/console.h> +#include <linux/smp_lock.h> /* Don't take this from <ctype.h>: 011-015 on the screen aren't spaces */ #define isspace(c) ((c) == ' ') @@ -312,6 +313,8 @@ int paste_selection(struct tty_struct *tty) struct tty_ldisc *ld; DECLARE_WAITQUEUE(wait, current); + lock_kernel(); + acquire_console_sem(); poke_blanked_console(); release_console_sem(); @@ -335,5 +338,6 @@ int paste_selection(struct tty_struct *tty) __set_current_state(TASK_RUNNING); tty_ldisc_deref(ld); + unlock_kernel(); return 0; } diff --git a/drivers/char/vt.c b/drivers/char/vt.c index 82f64ac2119..9f67ad919a4 100644 --- a/drivers/char/vt.c +++ b/drivers/char/vt.c @@ -287,8 +287,12 @@ static inline unsigned short *screenpos(struct vc_data *vc, int offset, int view return p; } +/* Called from the keyboard irq path.. */ static inline void scrolldelta(int lines) { + /* FIXME */ + /* scrolldelta needs some kind of consistency lock, but the BKL was + and still is not protecting versus the scheduled back end */ scrollback_delta += lines; schedule_console_callback(); } @@ -2616,8 +2620,6 @@ int tioclinux(struct tty_struct *tty, unsigned long arg) return -EFAULT; ret = 0; - lock_kernel(); - switch (type) { case TIOCL_SETSEL: @@ -2692,7 +2694,6 @@ int tioclinux(struct tty_struct *tty, unsigned long arg) ret = -EINVAL; break; } - unlock_kernel(); return ret; } |