提交 5dab600e 编写于 作者: A Andi Kleen 提交者: Linus Torvalds

kfifo: document everywhere that size has to be power of two

On my first try using them I missed that the fifos need to be power of
two, resulting in a runtime bug.  Document that requirement everywhere
(and fix one grammar bug)
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Acked-by: NStefani Seibold <stefani@seibold.net>
Cc: Roland Dreier <rdreier@cisco.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Andy Walls <awalls@radix.net>
Cc: Vikram Dhillon <dhillonv10@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 d994ffc2
......@@ -67,7 +67,7 @@ struct kfifo {
/**
* DECLARE_KFIFO - macro to declare a kfifo and the associated buffer
* @name: name of the declared kfifo datatype
* @size: size of the fifo buffer
* @size: size of the fifo buffer. Must be a power of two.
*
* Note1: the macro can be used inside struct or union declaration
* Note2: the macro creates two objects:
......@@ -91,7 +91,7 @@ union { \
/**
* DEFINE_KFIFO - macro to define and initialize a kfifo
* @name: name of the declared kfifo datatype
* @size: size of the fifo buffer
* @size: size of the fifo buffer. Must be a power of two.
*
* Note1: the macro can be used for global and local kfifo data type variables
* Note2: the macro creates two objects:
......
......@@ -41,7 +41,7 @@ static void _kfifo_init(struct kfifo *fifo, void *buffer,
* kfifo_init - initialize a FIFO using a preallocated buffer
* @fifo: the fifo to assign the buffer
* @buffer: the preallocated buffer to be used.
* @size: the size of the internal buffer, this have to be a power of 2.
* @size: the size of the internal buffer, this has to be a power of 2.
*
*/
void kfifo_init(struct kfifo *fifo, void *buffer, unsigned int size)
......
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