[src/trunk]: src/sys/external/bsd/drm2/include/linux linux: INIT_KFIFO

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f7c813b9fee8
branches:  trunk
changeset: 1028870:f7c813b9fee8
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sun Dec 19 12:21:56 2021 +0000

description:
linux: INIT_KFIFO

diffstat:

 sys/external/bsd/drm2/include/linux/kfifo.h |  22 +++++++++++++++++-----
 1 files changed, 17 insertions(+), 5 deletions(-)

diffs (43 lines):

diff -r 8db3197b44c2 -r f7c813b9fee8 sys/external/bsd/drm2/include/linux/kfifo.h
--- a/sys/external/bsd/drm2/include/linux/kfifo.h       Sun Dec 19 12:21:29 2021 +0000
+++ b/sys/external/bsd/drm2/include/linux/kfifo.h       Sun Dec 19 12:21:56 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kfifo.h,v 1.4 2021/12/19 10:57:34 riastradh Exp $      */
+/*     $NetBSD: kfifo.h,v 1.5 2021/12/19 12:21:56 riastradh Exp $      */
 
 /*-
  * Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -61,6 +61,21 @@
 #define        DECLARE_KFIFO_PTR(FIFO, TYPE)   _KFIFO_PTR_TYPE(, TYPE) FIFO
 #define        DECLARE_KFIFO(FIFO, TYPE, N)    _KFIFO_TYPE(, TYPE, N) FIFO
 
+#define        INIT_KFIFO(FIFO) do                                                   \
+{                                                                            \
+       _init_kfifo(&(FIFO).kf_meta, sizeof((FIFO).kf_buf));                  \
+} while (0)
+
+static inline void
+_init_kfifo(struct kfifo_meta *meta, size_t nbytes)
+{
+
+       mutex_init(&meta->kfm_lock, MUTEX_DEFAULT, IPL_VM);
+       meta->kfm_head = 0;
+       meta->kfm_tail = 0;
+       meta->kfm_nbytes = nbytes;
+}
+
 _KFIFO_PTR_TYPE(kfifo, void);
 
 #define        kfifo_alloc(FIFO, SIZE, GFP)                                          \
@@ -78,10 +93,7 @@
        /* Type pun!  Hope void * == struct whatever *.  */
        memcpy(bufp, &buf, sizeof(void *));
 
-       mutex_init(&meta->kfm_lock, MUTEX_DEFAULT, IPL_VM);
-       meta->kfm_head = 0;
-       meta->kfm_tail = 0;
-       meta->kfm_nbytes = nbytes;
+       _init_kfifo(meta, nbytes);
 
        return 0;
 }