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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-19 03:40:31 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-19 03:40:31 +0400 |
| commit | ea2388f2813ec7871c40a8b18afb80b5674d6e1d (patch) | |
| tree | ed2a1e6efac1ea9fe515c97fa5d1811918ecfacd /include/linux/wait.h | |
| parent | 38137a5188b83ddf8b0054f6fb80265878c60888 (diff) | |
| parent | b5a8cad376eebbd8598642697e92a27983aee802 (diff) | |
| download | linux-ea2388f2813ec7871c40a8b18afb80b5674d6e1d.tar.xz | |
Merge branch 'akpm' (incoming from Andrew)
Merge misc fixes from Andrew Morton:
"13 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
thp: close race between split and zap huge pages
mm: fix new kernel-doc warning in filemap.c
mm: fix CONFIG_DEBUG_VM_RB description
mm: use paravirt friendly ops for NUMA hinting ptes
mips: export flush_icache_range
mm/hugetlb.c: add cond_resched_lock() in return_unused_surplus_pages()
wait: explain the shadowing and type inconsistencies
Shiraz has moved
Documentation/vm/numa_memory_policy.txt: fix wrong document in numa_memory_policy.txt
powerpc/mm: fix ".__node_distance" undefined
kernel/watchdog.c:touch_softlockup_watchdog(): use raw_cpu_write()
init/Kconfig: move the trusted keyring config option to general setup
vmscan: reclaim_clean_pages_from_list() must use mod_zone_page_state()
Diffstat (limited to 'include/linux/wait.h')
| -rw-r--r-- | include/linux/wait.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/include/linux/wait.h b/include/linux/wait.h index e7d9d9ed14f5..bd68819f0815 100644 --- a/include/linux/wait.h +++ b/include/linux/wait.h @@ -191,11 +191,23 @@ wait_queue_head_t *bit_waitqueue(void *, int); (!__builtin_constant_p(state) || \ state == TASK_INTERRUPTIBLE || state == TASK_KILLABLE) \ +/* + * The below macro ___wait_event() has an explicit shadow of the __ret + * variable when used from the wait_event_*() macros. + * + * This is so that both can use the ___wait_cond_timeout() construct + * to wrap the condition. + * + * The type inconsistency of the wait_event_*() __ret variable is also + * on purpose; we use long where we can return timeout values and int + * otherwise. + */ + #define ___wait_event(wq, condition, state, exclusive, ret, cmd) \ ({ \ __label__ __out; \ wait_queue_t __wait; \ - long __ret = ret; \ + long __ret = ret; /* explicit shadow */ \ \ INIT_LIST_HEAD(&__wait.task_list); \ if (exclusive) \ |