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author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-07-26 14:23:10 +0300 |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-07-26 14:43:33 +0300 |
commit | af055598542670c8533a58582813b1419949cae0 (patch) | |
tree | 901fa1bf635d5c1e91d08f9f4c2e4943516dbb71 /include/linux/srcu.h | |
parent | 9f15a4ab19ab33658dbc9fd37be5210e8c1ac622 (diff) | |
parent | 2d62c799f8ffac4f7ffba6a4e7f148827dfc24c7 (diff) | |
download | linux-af055598542670c8533a58582813b1419949cae0.tar.xz |
Merge airlied/drm-next into drm-misc-next
I need this to be able to apply the deferred fbdev setup patches, I
need the relevant prep work that landed through the drm-intel tree.
Also squash in conflict fixup from Laurent Pinchart.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'include/linux/srcu.h')
-rw-r--r-- | include/linux/srcu.h | 25 |
1 files changed, 4 insertions, 21 deletions
diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 4c1d5f7e62c4..39af9bc0f653 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -60,32 +60,15 @@ int init_srcu_struct(struct srcu_struct *sp); #include <linux/srcutiny.h> #elif defined(CONFIG_TREE_SRCU) #include <linux/srcutree.h> -#elif defined(CONFIG_CLASSIC_SRCU) -#include <linux/srcuclassic.h> -#else +#elif defined(CONFIG_SRCU) #error "Unknown SRCU implementation specified to kernel configuration" +#else +/* Dummy definition for things like notifiers. Actual use gets link error. */ +struct srcu_struct { }; #endif -/** - * call_srcu() - Queue a callback for invocation after an SRCU grace period - * @sp: srcu_struct in queue the callback - * @head: structure to be used for queueing the SRCU callback. - * @func: function to be invoked after the SRCU grace period - * - * The callback function will be invoked some time after a full SRCU - * grace period elapses, in other words after all pre-existing SRCU - * read-side critical sections have completed. However, the callback - * function might well execute concurrently with other SRCU read-side - * critical sections that started after call_srcu() was invoked. SRCU - * read-side critical sections are delimited by srcu_read_lock() and - * srcu_read_unlock(), and may be nested. - * - * The callback will be invoked from process context, but must nevertheless - * be fast and must not block. - */ void call_srcu(struct srcu_struct *sp, struct rcu_head *head, void (*func)(struct rcu_head *head)); - void cleanup_srcu_struct(struct srcu_struct *sp); int __srcu_read_lock(struct srcu_struct *sp) __acquires(sp); void __srcu_read_unlock(struct srcu_struct *sp, int idx) __releases(sp); |