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authorYi Li <yi.li@analog.com>2009-08-20 04:17:47 +0000
committerMike Frysinger <vapier@gentoo.org>2009-09-16 22:10:32 -0400
commitb6dbde27dd95cc0397d9722ad8365fa93a07b0d3 (patch)
tree1743551be50d891228e8b2ea5d9ac0811d01355c /arch/blackfin/kernel/traps.c
parent00dd66d012f944817a7d0cdcb0c8cb174e46937a (diff)
Blackfin: use raw_smp_processor_id() in exception code
When preempt debugging is enabled, smp_processor_id() may utilize the "current" structure. This may not be safe to access under all exceptions due to it being in dynamically allocated memory. So in exception code, make sure we use raw_smp_processor_id() instead to get at the real value directly. Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/kernel/traps.c')
-rw-r--r--arch/blackfin/kernel/traps.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index 7b3ba06e10a..56464cb8edf 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -227,7 +227,7 @@ asmlinkage void double_fault_c(struct pt_regs *fp)
printk(KERN_EMERG "Double Fault\n");
#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT
if (((long)fp->seqstat & SEQSTAT_EXCAUSE) == VEC_UNCOV) {
- unsigned int cpu = smp_processor_id();
+ unsigned int cpu = raw_smp_processor_id();
char buf[150];
decode_address(buf, cpu_pda[cpu].retx_doublefault);
printk(KERN_EMERG "While handling exception (EXCAUSE = 0x%x) at %s:\n",
@@ -263,7 +263,7 @@ asmlinkage notrace void trap_c(struct pt_regs *fp)
int j;
#endif
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
- unsigned int cpu = smp_processor_id();
+ unsigned int cpu = raw_smp_processor_id();
#endif
const char *strerror = NULL;
int sig = 0;
@@ -1098,7 +1098,7 @@ void show_regs(struct pt_regs *fp)
struct irqaction *action;
unsigned int i;
unsigned long flags = 0;
- unsigned int cpu = smp_processor_id();
+ unsigned int cpu = raw_smp_processor_id();
unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
verbose_printk(KERN_NOTICE "\n");
@@ -1126,13 +1126,13 @@ void show_regs(struct pt_regs *fp)
verbose_printk(KERN_NOTICE "\nSEQUENCER STATUS:\t\t%s\n", print_tainted());
verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx IMASK: %04lx SYSCFG: %04lx\n",
- (long)fp->seqstat, fp->ipend, cpu_pda[smp_processor_id()].ex_imask, fp->syscfg);
+ (long)fp->seqstat, fp->ipend, cpu_pda[raw_smp_processor_id()].ex_imask, fp->syscfg);
if (fp->ipend & EVT_IRPTEN)
verbose_printk(KERN_NOTICE " Global Interrupts Disabled (IPEND[4])\n");
- if (!(cpu_pda[smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 |
+ if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG13 | EVT_IVG12 | EVT_IVG11 |
EVT_IVG10 | EVT_IVG9 | EVT_IVG8 | EVT_IVG7 | EVT_IVTMR)))
verbose_printk(KERN_NOTICE " Peripheral interrupts masked off\n");
- if (!(cpu_pda[smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14)))
+ if (!(cpu_pda[raw_smp_processor_id()].ex_imask & (EVT_IVG15 | EVT_IVG14)))
verbose_printk(KERN_NOTICE " Kernel interrupts masked off\n");
if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) {
verbose_printk(KERN_NOTICE " HWERRCAUSE: 0x%lx\n",