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| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2015-06-19 17:28:03 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2015-06-19 18:26:15 +0300 |
| commit | 86dca36e6ba019650a94cadf922ea3d06dec0182 (patch) | |
| tree | 1880f9334e60f0255403b9482cf2fac1d0355479 /arch/arm64/include/asm/system_misc.h | |
| parent | 9e793ab84ed482047f7226595313f0f3a0aa6854 (diff) | |
| download | linux-86dca36e6ba019650a94cadf922ea3d06dec0182.tar.xz | |
arm64: use private ratelimit state along with show_unhandled_signals
printk_ratelimit() shares the ratelimiting state with other callers what
may lead to scenarios where at the time we want to print out debug
information we already limited, so nothing appears in the dmesg - this
makes exception-trace quite poor helper in debugging.
Additionally, we have imbalance with some messages limited with global
ratelimit state and other messages limited with their private state
defined via pr_*_ratelimited().
To address this inconsistency show_unhandled_signals_ratelimited()
macro is introduced and caller sites are converted to use it.
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/system_misc.h')
| -rw-r--r-- | arch/arm64/include/asm/system_misc.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/system_misc.h b/arch/arm64/include/asm/system_misc.h index 659fbf5925de..57f110bea6a8 100644 --- a/arch/arm64/include/asm/system_misc.h +++ b/arch/arm64/include/asm/system_misc.h @@ -23,6 +23,8 @@ #include <linux/compiler.h> #include <linux/linkage.h> #include <linux/irqflags.h> +#include <linux/signal.h> +#include <linux/ratelimit.h> #include <linux/reboot.h> struct pt_regs; @@ -43,6 +45,17 @@ extern void __show_regs(struct pt_regs *); extern void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); +#define show_unhandled_signals_ratelimited() \ +({ \ + static DEFINE_RATELIMIT_STATE(_rs, \ + DEFAULT_RATELIMIT_INTERVAL, \ + DEFAULT_RATELIMIT_BURST); \ + bool __show_ratelimited = false; \ + if (show_unhandled_signals && __ratelimit(&_rs)) \ + __show_ratelimited = true; \ + __show_ratelimited; \ +}) + #define UDBG_UNDEFINED (1 << 0) #define UDBG_SYSCALL (1 << 1) #define UDBG_BADABORT (1 << 2) |