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| author | Helge Deller <deller@gmx.de> | 2021-02-25 17:20:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-26 09:41:03 -0800 |
| commit | 152c432b128cb043fc107e8f211195fe94b2159c (patch) | |
| tree | 9c37a869af4790a80d328e8442fdcb673c305811 /fs/proc | |
| parent | 2956f4e4f0c504697f9dd6b84fd5c57ede35d333 (diff) | |
| download | linux-152c432b128cb043fc107e8f211195fe94b2159c.tar.gz linux-152c432b128cb043fc107e8f211195fe94b2159c.tar.bz2 linux-152c432b128cb043fc107e8f211195fe94b2159c.zip | |
proc/wchan: use printk format instead of lookup_symbol_name()
To resolve the symbol fuction name for wchan, use the printk format
specifier %ps instead of manually looking up the symbol function name
via lookup_symbol_name().
Link: https://lkml.kernel.org/r/20201217165413.GA1959@ls3530.fritz.box
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/base.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 56bf14316122..3851bfcdba56 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -67,7 +67,6 @@ #include <linux/mm.h> #include <linux/swap.h> #include <linux/rcupdate.h> -#include <linux/kallsyms.h> #include <linux/stacktrace.h> #include <linux/resource.h> #include <linux/module.h> @@ -386,19 +385,17 @@ static int proc_pid_wchan(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task) { unsigned long wchan; - char symname[KSYM_NAME_LEN]; - if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS)) - goto print0; + if (ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS)) + wchan = get_wchan(task); + else + wchan = 0; - wchan = get_wchan(task); - if (wchan && !lookup_symbol_name(wchan, symname)) { - seq_puts(m, symname); - return 0; - } + if (wchan) + seq_printf(m, "%ps", (void *) wchan); + else + seq_putc(m, '0'); -print0: - seq_putc(m, '0'); return 0; } #endif /* CONFIG_KALLSYMS */ |