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author | Ingo Molnar <mingo@elte.hu> | 2008-05-12 21:20:43 +0200 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-23 20:39:05 +0200 |
commit | f43fdad8627fec2d21df92799b254dceb66c9c3c (patch) | |
tree | 09a9c54beaea06b814b3f4e6724375de282d944b | |
parent | 4c11d7aed389375253b59e2b1865eec96663c65d (diff) | |
download | kernel_samsung_smdk4412-f43fdad8627fec2d21df92799b254dceb66c9c3c.zip kernel_samsung_smdk4412-f43fdad8627fec2d21df92799b254dceb66c9c3c.tar.gz kernel_samsung_smdk4412-f43fdad8627fec2d21df92799b254dceb66c9c3c.tar.bz2 |
ftrace: fix kexec
disable the tracer while kexec pulls the rug from under the old
kernel.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r-- | arch/x86/kernel/machine_kexec_32.c | 4 | ||||
-rw-r--r-- | arch/x86/kernel/machine_kexec_64.c | 4 | ||||
-rw-r--r-- | include/linux/ftrace.h | 7 |
3 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c index d0b234c..88923fd 100644 --- a/arch/x86/kernel/machine_kexec_32.c +++ b/arch/x86/kernel/machine_kexec_32.c @@ -11,6 +11,8 @@ #include <linux/delay.h> #include <linux/init.h> #include <linux/numa.h> +#include <linux/ftrace.h> + #include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/tlbflush.h> @@ -107,6 +109,8 @@ NORET_TYPE void machine_kexec(struct kimage *image) unsigned long page_list[PAGES_NR]; void *control_page; + tracer_disable(); + /* Interrupts aren't acceptable while we reboot */ local_irq_disable(); diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c index 576a03d..1558fdc 100644 --- a/arch/x86/kernel/machine_kexec_64.c +++ b/arch/x86/kernel/machine_kexec_64.c @@ -11,6 +11,8 @@ #include <linux/string.h> #include <linux/reboot.h> #include <linux/numa.h> +#include <linux/ftrace.h> + #include <asm/pgtable.h> #include <asm/tlbflush.h> #include <asm/mmu_context.h> @@ -184,6 +186,8 @@ NORET_TYPE void machine_kexec(struct kimage *image) unsigned long page_list[PAGES_NR]; void *control_page; + tracer_disable(); + /* Interrupts aren't acceptable while we reboot */ local_irq_disable(); diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index f5911d2..a42390c 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -68,6 +68,13 @@ extern void ftrace_call(void); extern void mcount_call(void); #endif +static inline void tracer_disable(void) +{ +#ifdef CONFIG_FTRACE + ftrace_enabled = 0; +#endif +} + #ifdef CONFIG_FRAME_POINTER /* TODO: need to fix this for ARM */ # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) |