From: Stefani Seibold <stefani@seibold.net>
Date: Tue, 22 Mar 2016 21:27:42 +0000 (-0700)
Subject: kfifo: fix sparse complaints
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=21b2f44315d735345f02356239a819debdd89462;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

kfifo: fix sparse complaints

This patch fix complaints by the sparse tool when using kfifo_put() with
non scalar types like structures (i.e.
drivers/iio/industrialio-event.c).

Casting a pointer to the value and read this pointer instead of directly
casting the value will fix this.

The generated code is equal.

Signed-off-by: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h
index 473b43678ad1..41eb6fdf87a8 100644
--- a/include/linux/kfifo.h
+++ b/include/linux/kfifo.h
@@ -401,7 +401,7 @@ __kfifo_int_must_check_helper( \
 			((typeof(__tmp->type))__kfifo->data) : \
 			(__tmp->buf) \
 			)[__kfifo->in & __tmp->kfifo.mask] = \
-				(typeof(*__tmp->type))__val; \
+				*(typeof(__tmp->type))&__val; \
 			smp_wmb(); \
 			__kfifo->in++; \
 		} \