diff options
Diffstat (limited to 'include/asm-powerpc/paca.h')
| -rw-r--r-- | include/asm-powerpc/paca.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-powerpc/paca.h b/include/asm-powerpc/paca.h index c6a5b1735666..fcd7b428ed0b 100644 --- a/include/asm-powerpc/paca.h +++ b/include/asm-powerpc/paca.h @@ -21,7 +21,18 @@ #include <asm/mmu.h> register struct paca_struct *local_paca asm("r13"); + +#if defined(CONFIG_DEBUG_PREEMPT) && defined(CONFIG_SMP) +extern unsigned int debug_smp_processor_id(void); /* from linux/smp.h */ +/* + * Add standard checks that preemption cannot occur when using get_paca(): + * otherwise the paca_struct it points to may be the wrong one just after. + */ +#define get_paca() ((void) debug_smp_processor_id(), local_paca) +#else #define get_paca() local_paca +#endif + #define get_lppaca() (get_paca()->lppaca_ptr) #define get_slb_shadow() (get_paca()->slb_shadow_ptr) |