diff options
| author | Shradha Gupta <shradhagupta@linux.microsoft.com> | 2026-10-09 03:22:32 -0700 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2026-10-21 00:19:40 -0700 |
| commit | 14c73a2b061e494ab6da346ab075b14f2a4b2d06 (patch) | |
| tree | 524eedba7a72d153e41ce3b3aa7a9efe83678bd2 /include/linux | |
| parent | 016ac8174d932db3615534ba15ce5f70b3a15913 (diff) | |
kexec: Add helper to report an active kexec reboot
A shutdown callback in a loadable module may need to distinguish a
kexec reboot from a normal restart, halt, or poweroff. The Hyper-V
VMBus driver needs this distinction when moving its kexec cleanup into
a common syscore shutdown callback.
Add kexec_is_in_progress() and export it to GPL modules so the callback
can remain guarded when VMBus is built as a module. Provide a false
inline implementation when CONFIG_KEXEC_CORE is disabled.
The helper reports only the normal kexec reboot path. Crash kexec and
preserve-context kexec do not set this state.
Signed-off-by: Shradha Gupta <shradhagupta@linux.microsoft.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Bradley Morgan <brads@mainlining.org>
Reviewed-by: Naman Jain <namjain@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/kexec.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 0af8ae4fdd08..aeb74b47c36e 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -468,6 +468,7 @@ bool kexec_load_permitted(int kexec_image_type); /* flag to track if kexec reboot is in progress */ extern bool kexec_in_progress; +bool kexec_is_in_progress(void); #ifndef page_to_boot_pfn static inline unsigned long page_to_boot_pfn(struct page *page) @@ -544,6 +545,7 @@ static inline void *kimage_map_segment(struct kimage *image, int idx) { return NULL; } static inline void kimage_unmap_segment(void *buffer) { } #define kexec_in_progress false +static inline bool kexec_is_in_progress(void) { return false; } #endif /* CONFIG_KEXEC_CORE */ #ifdef CONFIG_KEXEC_SIG |