Merge git://git.infradead.org/mtd-2.6

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / ftrace.c

diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index b1e5e2244eca4c46f0fb1c8b68efdea8b7338e1f..50ea0ac8c9bf2c27a53323b93b5d473bd7e1d028 100644 (file)
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -21,8 +21,7 @@
 #include <asm/nops.h>
 
 
-/* Long is fine, even if it is only 4 bytes ;-) */
-static unsigned long *ftrace_nop;
+static unsigned char ftrace_nop[MCOUNT_INSN_SIZE];
 
 union ftrace_code_union {
        char code[MCOUNT_INSN_SIZE];
@@ -40,7 +39,7 @@ static int ftrace_calc_offset(long ip, long addr)
 
 unsigned char *ftrace_nop_replace(void)
 {
-       return (char *)ftrace_nop;
+       return ftrace_nop;
 }
 
 unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr)
@@ -125,9 +124,6 @@ int __init ftrace_dyn_arch_init(void *data)
         * TODO: check the cpuid to determine the best nop.
         */
        asm volatile (
-               "jmp ftrace_test_jmp\n"
-               /* This code needs to stay around */
-               ".section .text, \"ax\"\n"
                "ftrace_test_jmp:"
                "jmp ftrace_test_p6nop\n"
                "nop\n"
@@ -138,8 +134,6 @@ int __init ftrace_dyn_arch_init(void *data)
                "jmp 1f\n"
                "ftrace_test_nop5:"
                ".byte 0x66,0x66,0x66,0x66,0x90\n"
-               "jmp 1f\n"
-               ".previous\n"
                "1:"
                ".section .fixup, \"ax\"\n"
                "2:     movl $1, %0\n"
@@ -154,15 +148,15 @@ int __init ftrace_dyn_arch_init(void *data)
        switch (faulted) {
        case 0:
                pr_info("ftrace: converting mcount calls to 0f 1f 44 00 00\n");
-               ftrace_nop = (unsigned long *)ftrace_test_p6nop;
+               memcpy(ftrace_nop, ftrace_test_p6nop, MCOUNT_INSN_SIZE);
                break;
        case 1:
                pr_info("ftrace: converting mcount calls to 66 66 66 66 90\n");
-               ftrace_nop = (unsigned long *)ftrace_test_nop5;
+               memcpy(ftrace_nop, ftrace_test_nop5, MCOUNT_INSN_SIZE);
                break;
        case 2:
                pr_info("ftrace: converting mcount calls to jmp . + 5\n");
-               ftrace_nop = (unsigned long *)ftrace_test_jmp;
+               memcpy(ftrace_nop, ftrace_test_jmp, MCOUNT_INSN_SIZE);
                break;
        }