blob: b4fda3c3e92a5e5e315450374f5fa5697313e6d6 [file] [log] [blame]
#ifndef BACKPORT_LINUX_KFIFO_H
#define BACKPORT_LINUX_KFIFO_H
#include <linux/version.h>
#include_next <linux/kfifo.h>
#if LINUX_VERSION_IS_LESS(3,13,0)
#undef kfifo_put
/**
* kfifo_put - put data into the fifo
* @fifo: address of the fifo to be used
* @val: the data to be added
*
* This macro copies the given value into the fifo.
* It returns 0 if the fifo was full. Otherwise it returns the number
* processed elements.
*
* Note that with only one concurrent reader and one concurrent
* writer, you don't need extra locking to use these macro.
*/
#define kfifo_put(fifo, val) \
({ \
typeof((fifo) + 1) __tmp = (fifo); \
typeof((&val) + 1) __val = (&val); \
unsigned int __ret; \
const size_t __recsize = sizeof(*__tmp->rectype); \
struct __kfifo *__kfifo = &__tmp->kfifo; \
if (0) { \
typeof(__tmp->ptr_const) __dummy __attribute__ ((unused)); \
__dummy = (typeof(__val))NULL; \
} \
if (__recsize) \
__ret = __kfifo_in_r(__kfifo, __val, sizeof(*__val), \
__recsize); \
else { \
__ret = !kfifo_is_full(__tmp); \
if (__ret) { \
(__is_kfifo_ptr(__tmp) ? \
((typeof(__tmp->type))__kfifo->data) : \
(__tmp->buf) \
)[__kfifo->in & __tmp->kfifo.mask] = \
*(typeof(__tmp->type))__val; \
smp_wmb(); \
__kfifo->in++; \
} \
} \
__ret; \
})
#endif
#endif /* BACKPORT_LINUX_KFIFO_H */