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| author |   Steven Rostedt <srostedt@redhat.com> | 2008-11-25 10:22:48 -0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-11-28 14:07:56 +0100 |
| commit | ec682cef2d2c1a25a198d32a87fe2649da671d1e (patch) | |
| tree | 7713005f3f7819afc013358a4bfe938031d20628 /arch/powerpc/kernel/ftrace.c | |
| parent | powerpc: ftrace, fix cast aliasing and add code verification (diff) | |
| download | linux-dev-ec682cef2d2c1a25a198d32a87fe2649da671d1e.tar.xz linux-dev-ec682cef2d2c1a25a198d32a87fe2649da671d1e.zip | |
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>
Diffstat (limited to 'arch/powerpc/kernel/ftrace.c')
| -rw-r--r-- | arch/powerpc/kernel/ftrace.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c index ea454a004406..a4640e4f1172 100644 --- a/arch/powerpc/kernel/ftrace.c +++ b/arch/powerpc/kernel/ftrace.c @@ -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 */ |