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| author | Tobias Klauser <tklauser@distanz.ch> | 2020-09-19 06:20:34 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-09-19 22:13:39 +0200 |
| commit | 7bb82ac30c3dd4ecf1485685cbe84d2ba10dddf4 (patch) | |
| tree | fb21a1e50d2d92b0e7d208c6001f85af799fdbf3 | |
| parent | mm/memory_hotplug: drain per-cpu pages again during memory offline (diff) | |
| download | linux-7bb82ac30c3dd4ecf1485685cbe84d2ba10dddf4.tar.xz linux-7bb82ac30c3dd4ecf1485685cbe84d2ba10dddf4.zip | |
ftrace: let ftrace_enable_sysctl take a kernel pointer buffer
Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ctl_table.proc_handler to take a kernel pointer. Adjust the
signature of ftrace_enable_sysctl to match ctl_table.proc_handler which
fixes the following sparse warning:
kernel/trace/ftrace.c:7544:43: warning: incorrect type in argument 3 (different address spaces)
kernel/trace/ftrace.c:7544:43: expected void *
kernel/trace/ftrace.c:7544:43: got void [noderef] __user *buffer
Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/20200907093207.13540-1-tklauser@distanz.ch
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/ftrace.h | 3 | ||||
| -rw-r--r-- | kernel/trace/ftrace.c | 3 |
2 files changed, 2 insertions, 4 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index ce2c06f72e86..e5c2d5cc6e6a 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -85,8 +85,7 @@ static inline int ftrace_mod_get_kallsym(unsigned int symnum, unsigned long *val extern int ftrace_enabled; extern int ftrace_enable_sysctl(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, - loff_t *ppos); + void *buffer, size_t *lenp, loff_t *ppos); struct ftrace_ops; diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 275441254bb5..e9fa580f3083 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -7531,8 +7531,7 @@ static bool is_permanent_ops_registered(void) int ftrace_enable_sysctl(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, - loff_t *ppos) + void *buffer, size_t *lenp, loff_t *ppos) { int ret = -ENODEV; |