From: Tobias Klauser <tklauser@distanz.ch> To: Andrew Morton <akpm@linux-foundation.org> Cc: Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@redhat.com>, linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>, Al Viro <viro@zeniv.linux.org.uk> Subject: [PATCH] ftrace: let ftrace_enable_sysctl take a kernel pointer buffer Date: Mon, 7 Sep 2020 11:32:07 +0200 Message-ID: <20200907093207.13540-1-tklauser@distanz.ch> (raw) 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") Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Tobias Klauser <tklauser@distanz.ch> --- include/linux/ftrace.h | 3 +-- 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; -- 2.27.0
next reply index Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-09-07 9:32 Tobias Klauser [this message] -- strict thread matches above, loose matches on Subject: below -- 2020-08-25 8:17 Tobias Klauser
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