forked from Minki/linux
powerpc: ftrace, added missing icache flush
Impact: fix to PowerPC code modification After modifying code it is essential to flush the icache. This patch adds the missing flush. Reported-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -271,6 +271,9 @@ __ftrace_make_nop(struct module *mod,
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if (probe_kernel_write((void *)ip, &op, MCOUNT_INSN_SIZE))
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return -EPERM;
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flush_icache_range(ip, ip + 8);
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return 0;
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}
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@ -342,6 +345,8 @@ __ftrace_make_nop(struct module *mod,
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if (probe_kernel_write((void *)ip, &op, MCOUNT_INSN_SIZE))
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return -EPERM;
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flush_icache_range(ip, ip + 8);
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return 0;
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}
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#endif /* PPC64 */
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@ -438,6 +443,8 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
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if (probe_kernel_write((void *)ip, op, MCOUNT_INSN_SIZE * 2))
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return -EPERM;
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flush_icache_range(ip, ip + 8);
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return 0;
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}
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#else
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@ -481,6 +488,8 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
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if (probe_kernel_write((void *)ip, &op, MCOUNT_INSN_SIZE))
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return -EPERM;
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flush_icache_range(ip, ip + 8);
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return 0;
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}
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#endif /* CONFIG_PPC64 */
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