Commit-ID: 58b5f2cc4bdbc9b616e68639f5a84886aa5be590 Gitweb: http://git.kernel.org/tip/58b5f2cc4bdbc9b616e68639f5a84886aa5be590 Author: Borislav Petkov <bp@xxxxxxx> AuthorDate: Wed, 3 Feb 2016 12:33:38 +0100 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Tue, 9 Feb 2016 11:41:17 +0100 x86/microcode/intel: Move the BUG_ON up and turn it into WARN_ON If we're going to BUG_ON() because we're running on the wrong CPU, we better do it as the first thing we do when entering that function. And also, turn it into a WARN_ON() because it is not worth to panic the system if we apply the microcode on the wrong CPU - we're simply going to exit early. Tested-by: Thomas Voegtle <tv@xxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/1454499225-21544-11-git-send-email-bp@xxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/kernel/cpu/microcode/intel.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c index d1b2f58..c029c2b 100644 --- a/arch/x86/kernel/cpu/microcode/intel.c +++ b/arch/x86/kernel/cpu/microcode/intel.c @@ -843,12 +843,12 @@ static int apply_microcode_intel(int cpu) int cpu_num = raw_smp_processor_id(); struct cpuinfo_x86 *c = &cpu_data(cpu_num); - uci = ucode_cpu_info + cpu; - mc = uci->mc; - /* We should bind the task to the CPU */ - BUG_ON(cpu_num != cpu); + if (WARN_ON(cpu_num != cpu)) + return -1; + uci = ucode_cpu_info + cpu; + mc = uci->mc; if (!mc) return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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