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powerpc: ftrace, added missing icache flush

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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>
This commit is contained in:
Steven Rostedt 2008-11-25 10:22:48 -08:00 committed by Ingo Molnar
parent d9af12b72b
commit ec682cef2d
1 changed files with 9 additions and 0 deletions
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9
arch/powerpc/kernel/ftrace.c
View file

@ -271,6 +271,9 @@ __ftrace_make_nop(struct module *mod,
if (probe_kernel_write((void *)ip, &op, MCOUNT_INSN_SIZE))
return -EPERM;
flush_icache_range(ip, ip + 8);
return 0;
}
@ -342,6 +345,8 @@ __ftrace_make_nop(struct module *mod,
if (probe_kernel_write((void *)ip, &op, MCOUNT_INSN_SIZE))
return -EPERM;
flush_icache_range(ip, ip + 8);
return 0;
}
#endif /* PPC64 */
@ -438,6 +443,8 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
if (probe_kernel_write((void *)ip, op, MCOUNT_INSN_SIZE * 2))
return -EPERM;
flush_icache_range(ip, ip + 8);
return 0;
}
#else
@ -481,6 +488,8 @@ __ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
if (probe_kernel_write((void *)ip, &op, MCOUNT_INSN_SIZE))
return -EPERM;
flush_icache_range(ip, ip + 8);
return 0;
}
#endif /* CONFIG_PPC64 */