diff options
| -rw-r--r-- | arch/powerpc/include/asm/barrier.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h index 35c1b8f3aa68..f53c42380832 100644 --- a/arch/powerpc/include/asm/barrier.h +++ b/arch/powerpc/include/asm/barrier.h @@ -80,6 +80,22 @@ do { \ ___p1; \ }) +#ifdef CONFIG_PPC64 +#define smp_cond_load_relaxed(ptr, cond_expr) ({ \ + typeof(ptr) __PTR = (ptr); \ + __unqual_scalar_typeof(*ptr) VAL; \ + VAL = READ_ONCE(*__PTR); \ + if (unlikely(!(cond_expr))) { \ + spin_begin(); \ + do { \ + VAL = READ_ONCE(*__PTR); \ + } while (!(cond_expr)); \ + spin_end(); \ + } \ + (typeof(*ptr))VAL; \ +}) +#endif + #ifdef CONFIG_PPC_BOOK3S_64 #define NOSPEC_BARRIER_SLOT nop #elif defined(CONFIG_PPC_FSL_BOOK3E) |