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kfifo: fix kfifo_out_locked race bug
[GitHub/mt8127/android_kernel_alcatel_ttab.git]
/
include
/
linux
/
kfifo.h
diff --git
a/include/linux/kfifo.h
b/include/linux/kfifo.h
index 7c6b32a1421c000b33f1fa924f3f7ec43b32c551..c4ac88b3c30227f2473e026ec8fbe03a6213ee63 100644
(file)
--- a/
include/linux/kfifo.h
+++ b/
include/linux/kfifo.h
@@
-228,13
+228,6
@@
static inline __must_check unsigned int kfifo_out_locked(struct kfifo *fifo,
ret = kfifo_out(fifo, to, n);
- /*
- * optimization: if the FIFO is empty, set the indices to 0
- * so we don't wrap the next time
- */
- if (kfifo_is_empty(fifo))
- kfifo_reset(fifo);
-
spin_unlock_irqrestore(lock, flags);
return ret;