From: Kirill Korotaev Part of long forgotten patch http://groups.google.com/group/fa.linux.kernel/msg/e98e941ce1cf29f6?dmode=source Since then, m32r grabbed two copies. Leave s390 copy because of important absence of CONFIG_VT, but remove references to non-existent timerlist_lock. ia64 also loses timerlist_lock. Signed-off-by: Alexey Dobriyan Acked-by: Martin Schwidefsky Cc: Andi Kleen Cc: "Luck, Tony" Cc: Hirokazu Takata Signed-off-by: Andrew Morton --- arch/i386/mm/fault.c | 26 -------------------------- arch/ia64/kernel/traps.c | 30 ------------------------------ arch/m32r/mm/fault-nommu.c | 26 -------------------------- arch/m32r/mm/fault.c | 26 -------------------------- arch/s390/mm/fault.c | 4 +--- arch/x86_64/mm/fault.c | 21 --------------------- lib/Makefile | 4 ++-- lib/bust_spinlocks.c | 2 +- 8 files changed, 4 insertions(+), 135 deletions(-) diff -puN arch/i386/mm/fault.c~consolidate-bust_spinlocks arch/i386/mm/fault.c --- a/arch/i386/mm/fault.c~consolidate-bust_spinlocks +++ a/arch/i386/mm/fault.c @@ -60,32 +60,6 @@ static inline int notify_page_fault(stru } /* - * Unlock any spinlocks which will prevent us from getting the - * message out - */ -void bust_spinlocks(int yes) -{ - int loglevel_save = console_loglevel; - - if (yes) { - oops_in_progress = 1; - return; - } -#ifdef CONFIG_VT - unblank_screen(); -#endif - oops_in_progress = 0; - /* - * OK, the message is on the console. Now we call printk() - * without oops_in_progress set so that printk will give klogd - * a poke. Hold onto your hats... - */ - console_loglevel = 15; /* NMI oopser may have shut the console up */ - printk(" "); - console_loglevel = loglevel_save; -} - -/* * Return EIP plus the CS segment base. The segment limit is also * adjusted, clamped to the kernel/user address space (whichever is * appropriate), and returned in *eip_limit. diff -puN arch/ia64/kernel/traps.c~consolidate-bust_spinlocks arch/ia64/kernel/traps.c --- a/arch/ia64/kernel/traps.c~consolidate-bust_spinlocks +++ a/arch/ia64/kernel/traps.c @@ -24,8 +24,6 @@ #include #include -extern spinlock_t timerlist_lock; - fpswa_interface_t *fpswa_interface; EXPORT_SYMBOL(fpswa_interface); @@ -53,34 +51,6 @@ trap_init (void) fpswa_interface = __va(ia64_boot_param->fpswa); } -/* - * Unlock any spinlocks which will prevent us from getting the message out (timerlist_lock - * is acquired through the console unblank code) - */ -void -bust_spinlocks (int yes) -{ - int loglevel_save = console_loglevel; - - if (yes) { - oops_in_progress = 1; - return; - } - -#ifdef CONFIG_VT - unblank_screen(); -#endif - oops_in_progress = 0; - /* - * OK, the message is on the console. Now we call printk() without - * oops_in_progress set so that printk will give klogd a poke. Hold onto - * your hats... - */ - console_loglevel = 15; /* NMI oopser may have shut the console up */ - printk(" "); - console_loglevel = loglevel_save; -} - void die (const char *str, struct pt_regs *regs, long err) { diff -puN arch/m32r/mm/fault.c~consolidate-bust_spinlocks arch/m32r/mm/fault.c --- a/arch/m32r/mm/fault.c~consolidate-bust_spinlocks +++ a/arch/m32r/mm/fault.c @@ -49,32 +49,6 @@ unsigned int tlb_entry_d_dat[NR_CPUS]; extern void init_tlb(void); -/* - * Unlock any spinlocks which will prevent us from getting the - * message out - */ -void bust_spinlocks(int yes) -{ - int loglevel_save = console_loglevel; - - if (yes) { - oops_in_progress = 1; - return; - } -#ifdef CONFIG_VT - unblank_screen(); -#endif - oops_in_progress = 0; - /* - * OK, the message is on the console. Now we call printk() - * without oops_in_progress set so that printk will give klogd - * a poke. Hold onto your hats... - */ - console_loglevel = 15; /* NMI oopser may have shut the console up */ - printk(" "); - console_loglevel = loglevel_save; -} - /*======================================================================* * do_page_fault() *======================================================================* diff -puN arch/m32r/mm/fault-nommu.c~consolidate-bust_spinlocks arch/m32r/mm/fault-nommu.c --- a/arch/m32r/mm/fault-nommu.c~consolidate-bust_spinlocks +++ a/arch/m32r/mm/fault-nommu.c @@ -44,32 +44,6 @@ unsigned int tlb_entry_d_dat[NR_CPUS]; #define tlb_entry_d tlb_entry_d_dat[smp_processor_id()] #endif -/* - * Unlock any spinlocks which will prevent us from getting the - * message out - */ -void bust_spinlocks(int yes) -{ - int loglevel_save = console_loglevel; - - if (yes) { - oops_in_progress = 1; - return; - } -#ifdef CONFIG_VT - unblank_screen(); -#endif - oops_in_progress = 0; - /* - * OK, the message is on the console. Now we call printk() - * without oops_in_progress set so that printk will give klogd - * a poke. Hold onto your hats... - */ - console_loglevel = 15; /* NMI oopser may have shut the console up */ - printk(" "); - console_loglevel = loglevel_save; -} - void do_BUG(const char *file, int line) { bust_spinlocks(1); diff -puN arch/s390/mm/fault.c~consolidate-bust_spinlocks arch/s390/mm/fault.c --- a/arch/s390/mm/fault.c~consolidate-bust_spinlocks +++ a/arch/s390/mm/fault.c @@ -83,12 +83,10 @@ static inline int notify_page_fault(enum } #endif -extern spinlock_t timerlist_lock; /* * Unlock any spinlocks which will prevent us from getting the - * message out (timerlist_lock is acquired through the - * console unblank code) + * message out. */ void bust_spinlocks(int yes) { diff -puN arch/x86_64/mm/fault.c~consolidate-bust_spinlocks arch/x86_64/mm/fault.c --- a/arch/x86_64/mm/fault.c~consolidate-bust_spinlocks +++ a/arch/x86_64/mm/fault.c @@ -69,27 +69,6 @@ static inline int notify_page_fault(stru DIE_PAGE_FAULT, &args); } -void bust_spinlocks(int yes) -{ - int loglevel_save = console_loglevel; - if (yes) { - oops_in_progress = 1; - } else { -#ifdef CONFIG_VT - unblank_screen(); -#endif - oops_in_progress = 0; - /* - * OK, the message is on the console. Now we call printk() - * without oops_in_progress set so that printk will give klogd - * a poke. Hold onto your hats... - */ - console_loglevel = 15; /* NMI oopser may have shut the console up */ - printk(" "); - console_loglevel = loglevel_save; - } -} - /* Sometimes the CPU reports invalid exceptions on prefetch. Check that here and ignore. Opcode checker based on code by Richard Brunner */ diff -puN lib/bust_spinlocks.c~consolidate-bust_spinlocks lib/bust_spinlocks.c --- a/lib/bust_spinlocks.c~consolidate-bust_spinlocks +++ a/lib/bust_spinlocks.c @@ -14,7 +14,7 @@ #include -void bust_spinlocks(int yes) +void __attribute__((weak)) bust_spinlocks(int yes) { if (yes) { oops_in_progress = 1; diff -puN lib/Makefile~consolidate-bust_spinlocks lib/Makefile --- a/lib/Makefile~consolidate-bust_spinlocks +++ a/lib/Makefile @@ -3,7 +3,7 @@ # lib-y := ctype.o string.o vsprintf.o cmdline.o \ - bust_spinlocks.o rbtree.o radix-tree.o dump_stack.o \ + rbtree.o radix-tree.o dump_stack.o \ idr.o div64.o int_sqrt.o bitmap.o extable.o prio_tree.o \ sha1.o irq_regs.o reciprocal_div.o @@ -12,7 +12,7 @@ lib-$(CONFIG_SMP) += cpumask.o lib-y += kobject.o kref.o kobject_uevent.o klist.o -obj-y += sort.o parser.o halfmd4.o debug_locks.o random32.o +obj-y += sort.o parser.o halfmd4.o debug_locks.o random32.o bust_spinlocks.o ifeq ($(CONFIG_DEBUG_KOBJECT),y) CFLAGS_kobject.o += -DDEBUG _