4 commits

Author	SHA1	Message	Date
Stefan Hajnoczi	6172e3dc29	bitmap: add atomic test and clear ... The new bitmap_test_and_clear_atomic() function clears a range and returns whether or not the bits were set. Backports commit 36546e5b803f6e363906607307f27c489441fd15 from qemu	2018-02-13 10:02:12 -05:00
Stefan Hajnoczi	7ff5f05c82	bitmap: add atomic set functions ... Use atomic_or() for atomic bitmaps where several threads may set bits at the same time. This avoids the race condition between threads loading an element, bitwise ORing, and then storing the element. When setting all bits in a word we can avoid atomic ops and instead just use an smp_mb() at the end. Most bitmap users don't need atomicity so introduce new functions. Backports commit 9f02cfc84b85929947b32fe1674fbc6a429f332a from qemu	2018-02-13 09:59:30 -05:00
Nguyen Anh Quynh	c1f39c3db2	cleanup qemu/util code	2017-01-10 12:57:12 +08:00
Nguyen Anh Quynh	344d016104	import	2015-08-21 15:04:50 +08:00