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authorJagan Teki <jagan@amarulasolutions.com>2020-05-02 12:45:01 +0530
committerJagan Teki <jagan@amarulasolutions.com>2020-05-11 01:30:49 +0530
commit54232474d6fe9214942b79fa2608c3ad1d9f07d0 (patch)
tree0586dcd3c47b15d144ffc3dc0419e0347cdc2e3c /include/linux/iopoll.h
parentd7c56616dcc8cac6f5de8e605fd00486a59fef50 (diff)
iopoll: Add read_poll_timeout common API
Add read_poll_timeout common API similar to Linux iopoll. readx_poll_timeout will trigger read_poll_timeout with proper op. This will help to extend the functionalities like sleep_us to poll timeout in future. This change is referenced from Linux from below commit: commit <5f5323a14cad19323060a8cbf9d96f2280a462dd> ("iopoll: introduce read_poll_timeout macro") Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Diffstat (limited to 'include/linux/iopoll.h')
-rw-r--r--include/linux/iopoll.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/iopoll.h b/include/linux/iopoll.h
index ab0ae1969a..51966d83da 100644
--- a/include/linux/iopoll.h
+++ b/include/linux/iopoll.h
@@ -11,7 +11,7 @@
#include <time.h>
/**
- * readx_poll_timeout - Periodically poll an address until a condition is met or a timeout occurs
+ * read_poll_timeout - Periodically poll an address until a condition is met or a timeout occurs
* @op: accessor function (takes @addr as its only argument)
* @addr: Address to poll
* @val: Variable to read the value into
@@ -24,7 +24,7 @@
* When available, you'll probably want to use one of the specialized
* macros defined below rather than this macro directly.
*/
-#define readx_poll_timeout(op, addr, val, cond, timeout_us) \
+#define read_poll_timeout(op, addr, val, cond, timeout_us) \
({ \
unsigned long timeout = timer_get_us() + timeout_us; \
for (;;) { \
@@ -39,6 +39,8 @@
(cond) ? 0 : -ETIMEDOUT; \
})
+#define readx_poll_timeout(op, addr, val, cond, timeout_us) \
+ read_poll_timeout(op, addr, val, cond, timeout_us)
#define readb_poll_timeout(addr, val, cond, timeout_us) \
readx_poll_timeout(readb, addr, val, cond, timeout_us)