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authorAnil S Keshavamurthy <anil.s.keshavamurthy@intel.com>2006-01-09 23:52:43 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-10 11:01:40 -0500
commit49a2a1b83ba6fa40c41968d6a28ba16e7ed0c3f7 (patch)
treef257b535d0f09f9ac2531d40feb732349993665c /arch/i386/kernel/kprobes.c
parent41dead49ccb4d7f0a34d56478f487342a3c3ab2b (diff)
[PATCH] kprobes: changed from using spinlock to mutex
Since Kprobes runtime exception handlers is now lock free as this code path is now using RCU to walk through the list, there is no need for the register/unregister{_kprobe} to use spin_{lock/unlock}_isr{save/restore}. The serialization during registration/unregistration is now possible using just a mutex. In the above process, this patch also fixes a minor memory leak for x86_64 and powerpc. 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 'arch/i386/kernel/kprobes.c')
-rw-r--r--arch/i386/kernel/kprobes.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/i386/kernel/kprobes.c b/arch/i386/kernel/kprobes.c
index 19edcd526ba4..68fe10250486 100644
--- a/arch/i386/kernel/kprobes.c
+++ b/arch/i386/kernel/kprobes.c
@@ -58,13 +58,9 @@ static inline int is_IF_modifier(kprobe_opcode_t opcode)
58 58
59int __kprobes arch_prepare_kprobe(struct kprobe *p) 59int __kprobes arch_prepare_kprobe(struct kprobe *p)
60{ 60{
61 return 0;
62}
63
64void __kprobes arch_copy_kprobe(struct kprobe *p)
65{
66 memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t)); 61 memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t));
67 p->opcode = *p->addr; 62 p->opcode = *p->addr;
63 return 0;
68} 64}
69 65
70void __kprobes arch_arm_kprobe(struct kprobe *p) 66void __kprobes arch_arm_kprobe(struct kprobe *p)