Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: tracing, x86: fix constraint for parent variable tracing, x86: fix fixup section to return to original code profiling: fix broken profiling regression
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b3f2caaaa8
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@ -488,20 +488,21 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
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* ignore such a protection.
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*/
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asm volatile(
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"1: " _ASM_MOV " (%[parent_old]), %[old]\n"
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"2: " _ASM_MOV " %[return_hooker], (%[parent_replaced])\n"
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"1: " _ASM_MOV " (%[parent]), %[old]\n"
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"2: " _ASM_MOV " %[return_hooker], (%[parent])\n"
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" movl $0, %[faulted]\n"
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"3:\n"
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".section .fixup, \"ax\"\n"
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"3: movl $1, %[faulted]\n"
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"4: movl $1, %[faulted]\n"
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" jmp 3b\n"
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".previous\n"
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_ASM_EXTABLE(1b, 3b)
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_ASM_EXTABLE(2b, 3b)
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_ASM_EXTABLE(1b, 4b)
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_ASM_EXTABLE(2b, 4b)
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: [parent_replaced] "=r" (parent), [old] "=r" (old),
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[faulted] "=r" (faulted)
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: [parent_old] "0" (parent), [return_hooker] "r" (return_hooker)
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: [old] "=r" (old), [faulted] "=r" (faulted)
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: [parent] "r" (parent), [return_hooker] "r" (return_hooker)
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: "memory"
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);
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@ -114,12 +114,15 @@ int __ref profile_init(void)
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if (!slab_is_available()) {
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prof_buffer = alloc_bootmem(buffer_bytes);
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alloc_bootmem_cpumask_var(&prof_cpu_mask);
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cpumask_copy(prof_cpu_mask, cpu_possible_mask);
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return 0;
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}
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if (!alloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
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return -ENOMEM;
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cpumask_copy(prof_cpu_mask, cpu_possible_mask);
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prof_buffer = kzalloc(buffer_bytes, GFP_KERNEL);
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if (prof_buffer)
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return 0;
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