Remove the KHO notifier system. Eliminate the core KHO notifier API functions (`register_kho_notifier`, `unregister_kho_notifier`), the `kho_event` enum, and the notifier chain head from KHO internal structures.
This infrastructure was used to support the now-removed finalize and abort states and is no longer required. Client subsystems now interact with KHO through direct API calls. Signed-off-by: Jason Miu <[email protected]> --- include/linux/kexec_handover.h | 20 -------------------- kernel/kexec_handover.c | 15 --------------- 2 files changed, 35 deletions(-) diff --git a/include/linux/kexec_handover.h b/include/linux/kexec_handover.h index e29dcf53de7e..09e8f0b0fcab 100644 --- a/include/linux/kexec_handover.h +++ b/include/linux/kexec_handover.h @@ -10,14 +10,7 @@ struct kho_scratch { phys_addr_t size; }; -/* KHO Notifier index */ -enum kho_event { - KEXEC_KHO_FINALIZE = 0, - KEXEC_KHO_ABORT = 1, -}; - struct folio; -struct notifier_block; #ifdef CONFIG_KEXEC_HANDOVER bool kho_is_enabled(void); @@ -28,9 +21,6 @@ struct folio *kho_restore_folio(phys_addr_t phys); int kho_add_subtree(const char *name, void *fdt); int kho_retrieve_subtree(const char *name, phys_addr_t *phys); -int register_kho_notifier(struct notifier_block *nb); -int unregister_kho_notifier(struct notifier_block *nb); - void kho_memory_init(void); void kho_populate(phys_addr_t fdt_phys, u64 fdt_len, phys_addr_t scratch_phys, @@ -66,16 +56,6 @@ static inline int kho_retrieve_subtree(const char *name, phys_addr_t *phys) return -EOPNOTSUPP; } -static inline int register_kho_notifier(struct notifier_block *nb) -{ - return -EOPNOTSUPP; -} - -static inline int unregister_kho_notifier(struct notifier_block *nb) -{ - return -EOPNOTSUPP; -} - static inline void kho_memory_init(void) { } diff --git a/kernel/kexec_handover.c b/kernel/kexec_handover.c index f7933b434364..62f654b08c74 100644 --- a/kernel/kexec_handover.c +++ b/kernel/kexec_handover.c @@ -16,7 +16,6 @@ #include <linux/libfdt.h> #include <linux/list.h> #include <linux/memblock.h> -#include <linux/notifier.h> #include <linux/page-isolation.h> #include <asm/early_ioremap.h> @@ -683,13 +682,11 @@ static int kho_debugfs_fdt_add(struct list_head *list, struct dentry *dir, } struct kho_out { - struct blocking_notifier_head chain_head; struct dentry *dir; struct kho_serialization ser; }; static struct kho_out kho_out = { - .chain_head = BLOCKING_NOTIFIER_INIT(kho_out.chain_head), .ser = { .fdt_list = LIST_HEAD_INIT(kho_out.ser.fdt_list), }, @@ -727,18 +724,6 @@ int kho_add_subtree(const char *name, void *fdt) } EXPORT_SYMBOL_GPL(kho_add_subtree); -int register_kho_notifier(struct notifier_block *nb) -{ - return blocking_notifier_chain_register(&kho_out.chain_head, nb); -} -EXPORT_SYMBOL_GPL(register_kho_notifier); - -int unregister_kho_notifier(struct notifier_block *nb) -{ - return blocking_notifier_chain_unregister(&kho_out.chain_head, nb); -} -EXPORT_SYMBOL_GPL(unregister_kho_notifier); - /** * kho_preserve_folio - preserve a folio across kexec. * @folio: folio to preserve. -- 2.51.0.384.g4c02a37b29-goog
