git: 06cfd1047da6 - main - linuxkpi: Add `register_pm_notifier()` and `unregister_pm_notifier()`

The branch main has been updated by dumbbell:

URL: https://cgit.FreeBSD.org/src/commit/?id=06cfd1047da6f3cdba80da371592980a7143a7b6

commit 06cfd1047da6f3cdba80da371592980a7143a7b6
Author:     Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
AuthorDate: 2026-04-20 22:04:27 +0000
Commit:     Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
CommitDate: 2026-04-22 18:09:55 +0000

    linuxkpi: Add `register_pm_notifier()` and `unregister_pm_notifier()`
    
    They are empty stub returning success for now, like the previously
    defined stubs in this header.
    
    Several constant are also defined in the process.
    
    The amdgpu DRM driver started to use them in Linux 6.12.x.
    
    Reviewed by:    bz
    Sponsored by:   The FreeBSD Foundation
    Differential Revision: https://reviews.freebsd.org/D56572
---
 sys/compat/linuxkpi/common/include/linux/suspend.h | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/sys/compat/linuxkpi/common/include/linux/suspend.h b/sys/compat/linuxkpi/common/include/linux/suspend.h
index 3d5d5d594127..3a8bec392437 100644
--- a/sys/compat/linuxkpi/common/include/linux/suspend.h
+++ b/sys/compat/linuxkpi/common/include/linux/suspend.h
@@ -20,10 +20,29 @@ extern suspend_state_t pm_suspend_target_state;
 #define	PM_SUSPEND_MIN		PM_SUSPEND_TO_IDLE
 #define	PM_SUSPEND_MAX		4
 
+#define	PM_HIBERNATION_PREPARE	0x0001
+#define	PM_POST_HIBERNATION	0x0002
+#define	PM_SUSPEND_PREPARE	0x0003
+#define	PM_POST_SUSPEND		0x0004
+#define	PM_RESTORE_PREPARE	0x0005
+#define	PM_POST_RESTORE		0x0006
+
 static inline int
 pm_suspend_via_firmware(void)
 {
-	return 0;
+	return (0);
+}
+
+static inline int
+register_pm_notifier(struct notifier_block *nb)
+{
+	return (0);
+}
+
+static inline int
+unregister_pm_notifier(struct notifier_block *nb)
+{
+	return (0);
 }
 
 #endif	/* _LINUXKPI_LINUX_SUSPEND_H_ */