kfifo: fix kfifo_alloc() and kfifo_init()

Fix kfifo_alloc() and kfifo_init() to alloc at least the requested number of elements. Since the kfifo operates on power of 2 the request size will be rounded up to the next power of two.

Stefani Seibold committed 13 years ago

Commit dfe2a771 parent c759b351 file · +2 −4Browse files

Unified · Split

lib/kfifo.c+2−4

@@ -42,8 +42,7 @@ int __kfifo_alloc(struct __kfifo *fifo, unsigned int size, · 41 unmodified lines
42	42	* round down to the next power of 2, since our 'let the indices
43	43	* wrap' technique works only in this case.
44	44	*/
45		− if (!is_power_of_2(size))
46		− size = rounddown_pow_of_two(size);
	45	+ size = roundup_pow_of_two(size);
47	46
48	47	fifo->in = 0;
49	48	fifo->out = 0;
@@ -83,8 +82,7 @@ int __kfifo_init(struct __kfifo fifo, void buffer, · 33 unmodified lines
83	82	{
84	83	size /= esize;
85	84
86		− if (!is_power_of_2(size))
87		− size = rounddown_pow_of_two(size);
	85	+ size = roundup_pow_of_two(size);
88	86
89	87	fifo->in = 0;
90	88	fifo->out = 0;