diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/dumpstack.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/dumpstack_64.c | 8 | ||||
| -rw-r--r-- | arch/x86/mm/fault.c | 4 | ||||
| -rw-r--r-- | arch/x86/xen/spinlock.c | 27 |
4 files changed, 30 insertions, 12 deletions
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c index 1aae78f775fc..4025fe4f928f 100644 --- a/arch/x86/kernel/dumpstack.c +++ b/arch/x86/kernel/dumpstack.c @@ -252,7 +252,8 @@ int __kprobes __die(const char *str, struct pt_regs *regs, long err) unsigned short ss; unsigned long sp; #endif - printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter); + printk(KERN_DEFAULT + "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter); #ifdef CONFIG_PREEMPT printk("PREEMPT "); #endif diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c index 6d728d9284bd..17107bd6e1f0 100644 --- a/arch/x86/kernel/dumpstack_64.c +++ b/arch/x86/kernel/dumpstack_64.c @@ -129,7 +129,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, if (!stack) { if (regs) stack = (unsigned long *)regs->sp; - else if (task && task != current) + else if (task != current) stack = (unsigned long *)task->thread.sp; else stack = &dummy; @@ -269,11 +269,11 @@ void show_registers(struct pt_regs *regs) unsigned char c; u8 *ip; - printk(KERN_EMERG "Stack:\n"); + printk(KERN_DEFAULT "Stack:\n"); show_stack_log_lvl(NULL, regs, (unsigned long *)sp, - 0, KERN_EMERG); + 0, KERN_DEFAULT); - printk(KERN_EMERG "Code: "); + printk(KERN_DEFAULT "Code: "); ip = (u8 *)regs->ip - code_prologue; if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) { diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 9d74824a708d..f0b4caf85c1a 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -673,7 +673,7 @@ no_context(struct pt_regs *regs, unsigned long error_code, stackend = end_of_stack(tsk); if (tsk != &init_task && *stackend != STACK_END_MAGIC) - printk(KERN_ALERT "Thread overran stack, or stack corrupted\n"); + printk(KERN_EMERG "Thread overran stack, or stack corrupted\n"); tsk->thread.cr2 = address; tsk->thread.trap_no = 14; @@ -684,7 +684,7 @@ no_context(struct pt_regs *regs, unsigned long error_code, sig = 0; /* Executive summary in case the body of the oops scrolled away */ - printk(KERN_EMERG "CR2: %016lx\n", address); + printk(KERN_DEFAULT "CR2: %016lx\n", address); oops_end(flags, regs, sig); } diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c index cc9b1e182fcf..d69cc6c3f808 100644 --- a/arch/x86/xen/spinlock.c +++ b/arch/x86/xen/spinlock.c @@ -116,9 +116,26 @@ static inline void spin_time_accum_blocked(u64 start) } #endif /* CONFIG_XEN_DEBUG_FS */ +/* + * Size struct xen_spinlock so it's the same as arch_spinlock_t. + */ +#if NR_CPUS < 256 +typedef u8 xen_spinners_t; +# define inc_spinners(xl) \ + asm(LOCK_PREFIX " incb %0" : "+m" ((xl)->spinners) : : "memory"); +# define dec_spinners(xl) \ + asm(LOCK_PREFIX " decb %0" : "+m" ((xl)->spinners) : : "memory"); +#else +typedef u16 xen_spinners_t; +# define inc_spinners(xl) \ + asm(LOCK_PREFIX " incw %0" : "+m" ((xl)->spinners) : : "memory"); +# define dec_spinners(xl) \ + asm(LOCK_PREFIX " decw %0" : "+m" ((xl)->spinners) : : "memory"); +#endif + struct xen_spinlock { unsigned char lock; /* 0 -> free; 1 -> locked */ - unsigned short spinners; /* count of waiting cpus */ + xen_spinners_t spinners; /* count of waiting cpus */ }; static int xen_spin_is_locked(struct arch_spinlock *lock) @@ -164,8 +181,7 @@ static inline struct xen_spinlock *spinning_lock(struct xen_spinlock *xl) wmb(); /* set lock of interest before count */ - asm(LOCK_PREFIX " incw %0" - : "+m" (xl->spinners) : : "memory"); + inc_spinners(xl); return prev; } @@ -176,8 +192,7 @@ static inline struct xen_spinlock *spinning_lock(struct xen_spinlock *xl) */ static inline void unspinning_lock(struct xen_spinlock *xl, struct xen_spinlock *prev) { - asm(LOCK_PREFIX " decw %0" - : "+m" (xl->spinners) : : "memory"); + dec_spinners(xl); wmb(); /* decrement count before restoring lock */ __this_cpu_write(lock_spinners, prev); } @@ -373,6 +388,8 @@ void xen_uninit_lock_cpu(int cpu) void __init xen_init_spinlocks(void) { + BUILD_BUG_ON(sizeof(struct xen_spinlock) > sizeof(arch_spinlock_t)); + pv_lock_ops.spin_is_locked = xen_spin_is_locked; pv_lock_ops.spin_is_contended = xen_spin_is_contended; pv_lock_ops.spin_lock = xen_spin_lock; |