diff options
Diffstat (limited to 'kernel/printk.c')
-rw-r--r-- | kernel/printk.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index 69188f226a93..e3602d0755b0 100644 --- a/kernel/printk.c +++ b/kernel/printk.c | |||
@@ -73,7 +73,6 @@ EXPORT_SYMBOL(oops_in_progress); | |||
73 | * driver system. | 73 | * driver system. |
74 | */ | 74 | */ |
75 | static DECLARE_MUTEX(console_sem); | 75 | static DECLARE_MUTEX(console_sem); |
76 | static DECLARE_MUTEX(secondary_console_sem); | ||
77 | struct console *console_drivers; | 76 | struct console *console_drivers; |
78 | EXPORT_SYMBOL_GPL(console_drivers); | 77 | EXPORT_SYMBOL_GPL(console_drivers); |
79 | 78 | ||
@@ -891,12 +890,14 @@ void suspend_console(void) | |||
891 | printk("Suspending console(s) (use no_console_suspend to debug)\n"); | 890 | printk("Suspending console(s) (use no_console_suspend to debug)\n"); |
892 | acquire_console_sem(); | 891 | acquire_console_sem(); |
893 | console_suspended = 1; | 892 | console_suspended = 1; |
893 | up(&console_sem); | ||
894 | } | 894 | } |
895 | 895 | ||
896 | void resume_console(void) | 896 | void resume_console(void) |
897 | { | 897 | { |
898 | if (!console_suspend_enabled) | 898 | if (!console_suspend_enabled) |
899 | return; | 899 | return; |
900 | down(&console_sem); | ||
900 | console_suspended = 0; | 901 | console_suspended = 0; |
901 | release_console_sem(); | 902 | release_console_sem(); |
902 | } | 903 | } |
@@ -912,11 +913,9 @@ void resume_console(void) | |||
912 | void acquire_console_sem(void) | 913 | void acquire_console_sem(void) |
913 | { | 914 | { |
914 | BUG_ON(in_interrupt()); | 915 | BUG_ON(in_interrupt()); |
915 | if (console_suspended) { | ||
916 | down(&secondary_console_sem); | ||
917 | return; | ||
918 | } | ||
919 | down(&console_sem); | 916 | down(&console_sem); |
917 | if (console_suspended) | ||
918 | return; | ||
920 | console_locked = 1; | 919 | console_locked = 1; |
921 | console_may_schedule = 1; | 920 | console_may_schedule = 1; |
922 | } | 921 | } |
@@ -926,6 +925,10 @@ int try_acquire_console_sem(void) | |||
926 | { | 925 | { |
927 | if (down_trylock(&console_sem)) | 926 | if (down_trylock(&console_sem)) |
928 | return -1; | 927 | return -1; |
928 | if (console_suspended) { | ||
929 | up(&console_sem); | ||
930 | return -1; | ||
931 | } | ||
929 | console_locked = 1; | 932 | console_locked = 1; |
930 | console_may_schedule = 0; | 933 | console_may_schedule = 0; |
931 | return 0; | 934 | return 0; |
@@ -979,7 +982,7 @@ void release_console_sem(void) | |||
979 | unsigned wake_klogd = 0; | 982 | unsigned wake_klogd = 0; |
980 | 983 | ||
981 | if (console_suspended) { | 984 | if (console_suspended) { |
982 | up(&secondary_console_sem); | 985 | up(&console_sem); |
983 | return; | 986 | return; |
984 | } | 987 | } |
985 | 988 | ||