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authorChristoph Hellwig <hch@lst.de>2007-10-16 01:24:07 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:42:50 -0700
commit74a0b5762713a26496db72eac34fbbed46f20fce (patch)
tree4a14df7c07ebc16283454f33713519a0e10b5c43 /include/asm-powerpc
parentd5a7430ddcdb598261d70f7eb1bf450b5be52085 (diff)
downloadop-kernel-dev-74a0b5762713a26496db72eac34fbbed46f20fce.zip
op-kernel-dev-74a0b5762713a26496db72eac34fbbed46f20fce.tar.gz
x86: optimize page faults like all other achitectures and kill notifier cruft
x86(-64) are the last architectures still using the page fault notifier cruft for the kprobes page fault hook. This patch converts them to the proper direct calls, and removes the now unused pagefault notifier bits aswell as the cruft in kprobes.c that was related to this mess. I know Andi didn't really like this, but all other architecture maintainers agreed the direct calls are much better and besides the obvious cruft removal a common way of dealing with kprobes across architectures is important aswell. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix sparc64] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Andi Kleen <ak@suse.de> Cc: <linux-arch@vger.kernel.org> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/kdebug.h19
-rw-r--r--include/asm-powerpc/kprobes.h1
2 files changed, 0 insertions, 20 deletions
diff --git a/include/asm-powerpc/kdebug.h b/include/asm-powerpc/kdebug.h
index 295f016..ae6d206 100644
--- a/include/asm-powerpc/kdebug.h
+++ b/include/asm-powerpc/kdebug.h
@@ -2,25 +2,6 @@
#define _ASM_POWERPC_KDEBUG_H
#ifdef __KERNEL__
-/* nearly identical to x86_64/i386 code */
-
-#include <linux/notifier.h>
-
-/*
- * These are only here because kprobes.c wants them to implement a
- * blatant layering violation. Will hopefully go away soon once all
- * architectures are updated.
- */
-static inline int register_page_fault_notifier(struct notifier_block *nb)
-{
- return 0;
-}
-static inline int unregister_page_fault_notifier(struct notifier_block *nb)
-{
- return 0;
-}
-extern struct atomic_notifier_head powerpc_die_chain;
-
/* Grossly misnamed. */
enum die_val {
DIE_OOPS = 1,
diff --git a/include/asm-powerpc/kprobes.h b/include/asm-powerpc/kprobes.h
index 8b08b44..c16973d 100644
--- a/include/asm-powerpc/kprobes.h
+++ b/include/asm-powerpc/kprobes.h
@@ -81,7 +81,6 @@ typedef unsigned int kprobe_opcode_t;
#endif
#define ARCH_SUPPORTS_KRETPROBES
-#define ARCH_INACTIVE_KPROBE_COUNT 1
#define flush_insn_slot(p) do { } while (0)
void kretprobe_trampoline(void);
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