---

yaml --- r: 313624 b: refs/heads/master c: b6e3796 h: refs/heads/master v: v3
git-mirror · Jul 3, 2012 · c3a2ec4 · c3a2ec4
1 parent 7947e6d
commit c3a2ec4
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Showing 3 changed files with 13 additions and 7 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ee456bb346e75a9b6d941224b108250e6ee5f79f
+refs/heads/master: b6e3796834faefe4b6e9a2aedfe12665cd51fbc5
diff --git a/trunk/arch/powerpc/include/asm/code-patching.h b/trunk/arch/powerpc/include/asm/code-patching.h
@@ -26,8 +26,8 @@ unsigned int create_branch(const unsigned int *addr,
 			   unsigned long target, int flags);
 unsigned int create_cond_branch(const unsigned int *addr,
 				unsigned long target, int flags);
-void patch_branch(unsigned int *addr, unsigned long target, int flags);
-void patch_instruction(unsigned int *addr, unsigned int instr);
+int patch_branch(unsigned int *addr, unsigned long target, int flags);
+int patch_instruction(unsigned int *addr, unsigned int instr);
 
 int instr_is_relative_branch(unsigned int instr);
 int instr_is_branch_to_addr(const unsigned int *instr, unsigned long addr);

diff --git a/trunk/arch/powerpc/lib/code-patching.c b/trunk/arch/powerpc/lib/code-patching.c
@@ -13,17 +13,23 @@
 #include <linux/mm.h>
 #include <asm/page.h>
 #include <asm/code-patching.h>
+#include <asm/uaccess.h>
 
 
-void patch_instruction(unsigned int *addr, unsigned int instr)
+int patch_instruction(unsigned int *addr, unsigned int instr)
 {
-	*addr = instr;
+	int err;
+
+	err = __put_user(instr, addr);
+	if (err)
+		return err;
 	asm ("dcbst 0, %0; sync; icbi 0,%0; sync; isync" : : "r" (addr));
+	return 0;
 }
 
-void patch_branch(unsigned int *addr, unsigned long target, int flags)
+int patch_branch(unsigned int *addr, unsigned long target, int flags)
 {
-	patch_instruction(addr, create_branch(addr, target, flags));
+	return patch_instruction(addr, create_branch(addr, target, flags));
 }
 
 unsigned int create_branch(const unsigned int *addr,