diff options
| author | Mayank Rungta <mrungta@google.com> | 2026-07-30 15:00:21 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2026-08-10 09:00:05 -0700 |
| commit | bd26ae0caa20de77328f85a2de4860d8494f1217 (patch) | |
| tree | a883083d3c68fabe6509e6f97a9e7a686a92bcfb /lib/nmi_backtrace.c | |
| parent | b583ce85417befdc3d8a13458ed9b81e9421b665 (diff) | |
nmi: Export CPU backtrace APIs for loadable modules
Currently, CPU backtrace functions cannot be called from loadable
modules because the underlying helper arch_trigger_cpumask_backtrace()
is not exported.
Instead of exporting arch_trigger_cpumask_backtrace() individually
across every supported architecture, introduce and export a common
helper, cpumask_backtrace(), in lib/nmi_backtrace.c. Update the four
inline CPU backtrace macros in include/linux/nmi.h to route through this
centralized helper.
Signed-off-by: Mayank Rungta <mrungta@google.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lore.kernel.org/r/20260730-export-cpu-backtrace-apis-v1-1-bace8e1cb817@google.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'lib/nmi_backtrace.c')
| -rw-r--r-- | lib/nmi_backtrace.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/nmi_backtrace.c b/lib/nmi_backtrace.c index a3bfa9360b23..f39c9eca8888 100644 --- a/lib/nmi_backtrace.c +++ b/lib/nmi_backtrace.c @@ -19,6 +19,7 @@ #include <linux/stringify.h> #include <linux/nmi.h> #include <linux/cpu.h> +#include <linux/export.h> #include <linux/sched/debug.h> #ifdef arch_trigger_cpumask_backtrace @@ -129,4 +130,10 @@ bool nmi_cpu_backtrace(struct pt_regs *regs) return false; } NOKPROBE_SYMBOL(nmi_cpu_backtrace); + +void cpumask_backtrace(const cpumask_t *mask, int exclude_cpu) +{ + arch_trigger_cpumask_backtrace(mask, exclude_cpu); +} +EXPORT_SYMBOL_GPL(cpumask_backtrace); #endif |