Unverified Commit 493e2ba2 authored by Palmer Dabbelt's avatar Palmer Dabbelt
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asm-generic: qrwlock: Document the spinlock fairness requirements 



I could only find the fairness requirements documented as the C code,
this calls them out in a comment just to be a bit more explicit.

Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent a8ad07e5

include/asm-generic/qrwlock.h

+4 −0
Original line number Diff line number Diff line
@@ -2,6 +2,10 @@ 
/*

 * Queue read/write lock

 *

 * These use generic atomic and locking routines, but depend on a fair spinlock

 * implementation in order to be fair themselves.  The implementation in

 * asm-generic/spinlock.h meets these requirements.

 *

 * (C) Copyright 2013-2014 Hewlett-Packard Development Company, L.P.

 *

 * Authors: Waiman Long <waiman.long@hp.com>