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| author | Jacob Pan <jacob.jun.pan@intel.com> | 2009-09-17 16:36:43 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-20 01:25:17 +0100 |
| commit | 35f720c5930f689647d51ad77e2a8d6f0abf66c8 (patch) | |
| tree | 0b229f8ccb46d0cecf3698ef4cadb8232f105b58 /arch | |
| parent | x86, ioapic: Improve handling of i8259A irq init (diff) | |
| download | linux-35f720c5930f689647d51ad77e2a8d6f0abf66c8.tar.xz linux-35f720c5930f689647d51ad77e2a8d6f0abf66c8.zip | |
x86: Initialize stack canary in secondary start
Some secondary clockevent setup code needs to call request_irq, which
will cause fake stack check failure in schedule() if voluntary
preemption model is chosen. It is safe to have stack canary
initialized here early, since start_secondary() does not return.
Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
LKML-Reference: <43F901BD926A4E43B106BF17856F07559FB80D02@orsmsx508.amr.corp.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index b4e870cbdc60..3e6150d421e4 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -48,6 +48,7 @@ #include <linux/err.h> #include <linux/nmi.h> #include <linux/tboot.h> +#include <linux/stackprotector.h> #include <asm/acpi.h> #include <asm/desc.h> @@ -324,6 +325,9 @@ notrace static void __cpuinit start_secondary(void *unused) /* enable local interrupts */ local_irq_enable(); + /* to prevent fake stack check failure in clock setup */ + boot_init_stack_canary(); + x86_cpuinit.setup_percpu_clockev(); wmb(); |