lkml.org 
[lkml]   [2010]   [Aug]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch] kfifo: __must_check helper casts everything to unsigned
There is a new wrapper to add a __must_check to kfifo macros.  The
problem is that it casts everything to unsigned. That breaks for places
that check stuff like:

if (kfifo_alloc(&dlci->_fifo, 4096, GFP_KERNEL) < 0)

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h
index 311f875..437cc0d 100644
--- a/include/linux/kfifo.h
+++ b/include/linux/kfifo.h
@@ -177,6 +177,12 @@ __kfifo_must_check_helper(unsigned int val)
return val;
}

+static inline int __must_check
+__kfifo_must_check_helper_signed(int val)
+{
+ return val;
+}
+
/**
* kfifo_initialized - Check if the fifo is initialized
* @fifo: address of the fifo to check
@@ -323,7 +329,7 @@ __kfifo_must_check_helper( \
* Return 0 if no error, otherwise an error code.
*/
#define kfifo_alloc(fifo, size, gfp_mask) \
-__kfifo_must_check_helper( \
+__kfifo_must_check_helper_signed( \
({ \
typeof(fifo + 1) __tmp = (fifo); \
struct __kfifo *__kfifo = &__tmp->kfifo; \
@@ -609,7 +615,7 @@ __kfifo_must_check_helper( \
* writer, you don't need extra locking to use these macro.
*/
#define kfifo_from_user(fifo, from, len, copied) \
-__kfifo_must_check_helper( \
+__kfifo_must_check_helper_signed( \
({ \
typeof(fifo + 1) __tmp = (fifo); \
const void __user *__from = (from); \
@@ -637,7 +643,7 @@ __kfifo_must_check_helper( \
* writer, you don't need extra locking to use these macro.
*/
#define kfifo_to_user(fifo, to, len, copied) \
-__kfifo_must_check_helper( \
+__kfifo_must_check_helper_signed( \
({ \
typeof(fifo + 1) __tmp = (fifo); \
void __user *__to = (to); \

\
 
 \ /
  Last update: 2010-08-13 23:03    [W:0.037 / U:1.704 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site