diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/kfifo.h')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/kfifo.h | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/kfifo.h b/sys/compat/linuxkpi/common/include/linux/kfifo.h index d2f570781661..b0d0c17f07e4 100644 --- a/sys/compat/linuxkpi/common/include/linux/kfifo.h +++ b/sys/compat/linuxkpi/common/include/linux/kfifo.h @@ -33,8 +33,26 @@ #include <linux/slab.h> #include <linux/gfp.h> -#define INIT_KFIFO(x) 0 -#define DECLARE_KFIFO(x, y, z) +/* + * INIT_KFIFO() is used to initialize the structure declared with + * DECLARE_KFIFO(). It doesn't work with DECLARE_KFIFO_PTR(). + */ +#define INIT_KFIFO(_kf) \ + ({ \ + (_kf).total = nitems((_kf).head); \ + (_kf).count = 0; \ + (_kf).first = 0; \ + (_kf).last = 0; \ + }) + +#define DECLARE_KFIFO(_name, _type, _size) \ + struct kfifo_ ## _name { \ + size_t total; \ + size_t count; \ + size_t first; \ + size_t last; \ + _type head[_size]; \ + } _name #define DECLARE_KFIFO_PTR(_name, _type) \ struct kfifo_ ## _name { \ @@ -71,7 +89,7 @@ (_kf)->head[(_kf)->last] = (_e); \ (_kf)->count++; \ (_kf)->last++; \ - if ((_kf)->last > (_kf)->total) \ + if ((_kf)->last >= (_kf)->total) \ (_kf)->last = 0; \ _rc = true; \ } \ @@ -89,7 +107,7 @@ *(_e) = (_kf)->head[(_kf)->first]; \ (_kf)->count--; \ (_kf)->first++; \ - if ((_kf)->first > (_kf)->total) \ + if ((_kf)->first >= (_kf)->total) \ (_kf)->first = 0; \ _rc = true; \ } \ |