Merge tag 'hyperv-next-signed-20261028' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull hyperv updates from Wei Liu:

 - Update to documents and code comments (Michael Kelley)

 - Harden Vmbus (Kameron Carr)

 - Rework MSHV driver page deposit logic (Mukesh Rathor)

 - Vmbus kexec bug fix (Shradha Gupta)

 - Miscellaneous bug fixes (Daehyeon Ko, Jiale Yao, Sasha Levin)

* tag 'hyperv-next-signed-20261028' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  Drivers: hv: Remove leftover support for old Hyper-V versions
  mshv: Remove unused *_old memory deposit functions
  mshv: Redesign hypervisor memory deposit logic
  mshv: Rename memory deposit memory functions to _old
  mshv_vtl: reject poll files with multiple waitqueues
  mshv_vtl: detach poll waiter on POLLFREE
  mshv_vtl: initialize poll file mutex before device registration
  Documentation: hyperv: Update information on guest CPU offlining
  Documentation: hyperv: Remove support for guests on Hyper-V 2012/2012R2
  Drivers: hv: Run VMBus kexec cleanup from syscore shutdown
  kexec: Add helper to report an active kexec reboot
  tools: hv: remove unused rte_smp_mb()
  Documentation: hyperv: Update documentation for sending VMBus packets
  Drivers: hv: vmbus: Check ACPI companion before use
  Documentation: hyperv: Describe validation of the ring buffer indices
  Drivers: hv: vmbus: Keep the ring byte counts sane for a bad index
  Drivers: hv: vmbus: Compute ring byte counts from a caller-held snapshot
  Drivers: hv: vmbus: Use *_ONCE() to access shared ring buffer indices
  Drivers: hv: vmbus: Bounds check the shared ring buffer indices

1 files changed, 7 insertions, 0 deletions

diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index 7ee8c9f078f6..f4a31565c447 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -23,6 +23,7 @@
 #include <linux/hardirq.h>
 #include <linux/elf.h>
 #include <linux/elfcore.h>
+#include <linux/export.h>
 #include <linux/utsname.h>
 #include <linux/numa.h>
 #include <linux/suspend.h>
@@ -54,6 +55,12 @@ atomic_t __kexec_lock = ATOMIC_INIT(0);
 /* Flag to indicate we are going to kexec a new kernel */
 bool kexec_in_progress = false;
 
+bool kexec_is_in_progress(void)
+{
+	return kexec_in_progress;
+}
+EXPORT_SYMBOL_GPL(kexec_is_in_progress);
+
 bool kexec_file_dbg_print;
 
 /*