diff options
Diffstat (limited to 'arch/powerpc/perf/callchain_64.c')
| -rw-r--r-- | arch/powerpc/perf/callchain_64.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/powerpc/perf/callchain_64.c b/arch/powerpc/perf/callchain_64.c index fed90e827f3a..8d0df4226328 100644 --- a/arch/powerpc/perf/callchain_64.c +++ b/arch/powerpc/perf/callchain_64.c @@ -21,7 +21,8 @@ /* * On 64-bit we don't want to invoke hash_page on user addresses from * interrupt context, so if the access faults, we read the page tables - * to find which page (if any) is mapped and access it directly. + * to find which page (if any) is mapped and access it directly. Radix + * has no need for this so it doesn't use read_user_stack_slow. */ int read_user_stack_slow(const void __user *ptr, void *buf, int nb) { @@ -67,8 +68,8 @@ static int is_sigreturn_64_address(unsigned long nip, unsigned long fp) { if (nip == fp + offsetof(struct signal_frame_64, tramp)) return 1; - if (vdso64_rt_sigtramp && current->mm->context.vdso_base && - nip == current->mm->context.vdso_base + vdso64_rt_sigtramp) + if (current->mm->context.vdso && + nip == VDSO64_SYMBOL(current->mm->context.vdso, sigtramp_rt64)) return 1; return 0; } |