[PATCH 4.4 073/132] seq_buf: Avoid type mismatch for seq_buf_init

Greg Kroah-Hartman
2020-12-28T12:55:41Z

From: Arnd Bergmann <arnd@arndb.de>

[ Upstream commit d9a9280a0d0ae51dc1d4142138b99242b7ec8ac6 ]

Building with W=2 prints a number of warnings for one function that
has a pointer type mismatch:

linux/seq_buf.h: In function 'seq_buf_init':
linux/seq_buf.h:35:12: warning: pointer targets in assignment from 'unsigned char *' to 'char *' differ in signedness [-Wpointer-sign]

Change the type in the function prototype according to the type in
the structure.

Link: https://lkml.kernel.org/r/20201026161108.3707783-1-arnd@kernel.org

Fixes: 9a7777935c34 ("tracing: Convert seq_buf fields to be like seq_file fields")
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/linux/seq_buf.h | 2 +-
include/linux/trace_seq.h | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h
index fb7eb9ccb1cd4..d4c3c9bab5826 100644
--- a/include/linux/seq_buf.h
+++ b/include/linux/seq_buf.h
@@ -29,7 +29,7 @@ static inline void seq_buf_clear(struct seq_buf *s)
}

static inline void
-seq_buf_init(struct seq_buf *s, unsigned char *buf, unsigned int size)
+seq_buf_init(struct seq_buf *s, char *buf, unsigned int size)
{
s->buffer = buf;
s->size = size;
diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h
index cfaf5a1d4bad7..f5be2716b01c6 100644
--- a/include/linux/trace_seq.h
+++ b/include/linux/trace_seq.h
@@ -11,7 +11,7 @@
*/

struct trace_seq {
- unsigned char buffer[PAGE_SIZE];
+ char buffer[PAGE_SIZE];
struct seq_buf seq;
int full;
};
@@ -50,7 +50,7 @@ static inline int trace_seq_used(struct trace_seq *s)
* that is about to be written to and then return the result
* of that write.
*/
-static inline unsigned char *
+static inline char *
trace_seq_buffer_ptr(struct trace_seq *s)
{
return s->buffer + seq_buf_used(&s->seq);
--
2.27.0