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From: Li Zefan on 4 Nov 2009 00:20
# echo 'do_open' > set_graph_function
# echo 'do_open' >> set_graph_function
bash: echo: write error: Invalid argument

Make it valid to write the same value to set_graph_function.

Signed-off-by: Li Zefan <lizf(a)cn.fujitsu.com>
---
kernel/trace/ftrace.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index b1acfb1..13f256a 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2552,10 +2552,9 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer)
exists = true;
break;
}
- if (!exists) {
+ if (!exists)
array[(*idx)++] = rec->ip;
- found = 1;
- }
+ found = 1;
}
} while_for_each_ftrace_rec();

--
1.6.3

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Prev: sysfs: Update s_iattr on link and unlink.
Next: [RFC] Mount point suggestions for cgroup