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| author | Peter Hurley <peter@hurleysoftware.com> | 2016-01-09 21:35:23 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-27 15:13:28 -0800 |
| commit | 4a510969374ab8853451c337e43d28fb864e43fd (patch) | |
| tree | 7868ef29c68bd7265dcf6fe5b2ab4088abeb7842 /include/linux/tty.h | |
| parent | 527ffc11e1c0aa049b3a831d6f07ed98e06a0819 (diff) | |
| download | linux-4a510969374ab8853451c337e43d28fb864e43fd.tar.gz linux-4a510969374ab8853451c337e43d28fb864e43fd.tar.bz2 linux-4a510969374ab8853451c337e43d28fb864e43fd.zip | |
tty: Make tty_files_lock per-tty
Access to tty->tty_files list is always per-tty, never for all ttys
simultaneously. Replace global tty_files_lock spinlock with per-tty
->files_lock. Initialize when the ->tty_files list is inited, in
alloc_tty_struct().
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tty.h')
| -rw-r--r-- | include/linux/tty.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index da16b5980c25..780adbfc6dce 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -302,6 +302,7 @@ struct tty_struct { struct work_struct hangup_work; void *disc_data; void *driver_data; + spinlock_t files_lock; /* protects tty_files list */ struct list_head tty_files; #define N_TTY_BUF_SIZE 4096 @@ -508,7 +509,6 @@ extern int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty); extern struct mutex tty_mutex; -extern spinlock_t tty_files_lock; #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock)) |