summaryrefslogtreecommitdiffstats
path: root/arch/mips/kernel/ptrace32.c
diff options
context:
space:
mode:
authorAlex Smith <alex@alex-smith.me.uk>2014-07-23 14:40:06 +0100
committerRalf Baechle <ralf@linux-mips.org>2014-07-30 23:27:03 +0200
commit656ff9bef08c19a6471b49528dacb4cbbeb1e537 (patch)
tree0c2072970ccd0bbe36a7a80f135deae6ae6cd12a /arch/mips/kernel/ptrace32.c
parent6ee1d93455384cef8a0426effe85da241b525b63 (diff)
downloadlinux-656ff9bef08c19a6471b49528dacb4cbbeb1e537.tar.bz2
MIPS: ptrace: Avoid smp_processor_id() when retrieving FPU IR
Whenever ptrace attempts to retrieve the FPU implementation register it accesses it through current_cpu_data, which calls smp_processor_id(). Since the code may execute with preemption enabled, this can trigger a warning. Fix this by using boot_cpu_data to get the IR instead. Signed-off-by: Alex Smith <alex@alex-smith.me.uk> Cc: <stable@vger.kernel.org> # v3.15+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7449/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/ptrace32.c')
-rw-r--r--arch/mips/kernel/ptrace32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index b40c3ca60ee5..a83fb730b387 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -129,7 +129,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
break;
case FPC_EIR:
/* implementation / version register */
- tmp = current_cpu_data.fpu_id;
+ tmp = boot_cpu_data.fpu_id;
break;
case DSP_BASE ... DSP_BASE + 5: {
dspreg_t *dregs;