diff options
| author | Ananth N Mavinakayanahalli <ananth@in.ibm.com> | 2005-11-07 01:00:13 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-07 07:53:46 -0800 |
| commit | 3516a46042508a495fac13c2e73530d936ebe015 (patch) | |
| tree | 2d03117832b5c2439987de73420a38fc3e5983e4 /include/linux/kprobes.h | |
| parent | e7a510f92c1e482a7db05afd3cb84af1f4cfe0bc (diff) | |
[PATCH] Kprobes: Use RCU for (un)register synchronization - base changes
Changes to the base kprobes infrastructure to use RCU for synchronization
during kprobe registration and unregistration. These changes coupled with the
arch kprobe changes (next in series):
a. serialize registration and unregistration of kprobes.
b. enable lockless execution of handlers. Handlers can now run in parallel.
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/kprobes.h')
| -rw-r--r-- | include/linux/kprobes.h | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index 6720305a31e..cff281cf70c 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -34,6 +34,8 @@ #include <linux/notifier.h> #include <linux/smp.h> #include <linux/percpu.h> +#include <linux/spinlock.h> +#include <linux/rcupdate.h> #include <asm/kprobes.h> @@ -146,10 +148,7 @@ struct kretprobe_instance { }; #ifdef CONFIG_KPROBES -/* Locks kprobe: irq must be disabled */ -void lock_kprobes(void); -void unlock_kprobes(void); - +extern spinlock_t kretprobe_lock; extern int arch_prepare_kprobe(struct kprobe *p); extern void arch_copy_kprobe(struct kprobe *p); extern void arch_arm_kprobe(struct kprobe *p); @@ -160,7 +159,7 @@ extern void show_registers(struct pt_regs *regs); extern kprobe_opcode_t *get_insn_slot(void); extern void free_insn_slot(kprobe_opcode_t *slot); -/* Get the kprobe at this addr (if any). Must have called lock_kprobes */ +/* Get the kprobe at this addr (if any) - called under a rcu_read_lock() */ struct kprobe *get_kprobe(void *addr); struct hlist_head * kretprobe_inst_table_head(struct task_struct *tsk); |