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| author | Vlastimil Babka <vbabka@kernel.org> | 2026-02-27 20:07:59 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-04-05 23:53:12 +0300 |
| commit | 0a2c52a9a2f55e80fee6a10a846cadab590dc918 (patch) | |
| tree | ce165a221774b3482ab5bea50318ad1914e215ca /include/linux/errqueue.h | |
| parent | a373f371166df56eb3ec043d72dafc70a7d46536 (diff) | |
| download | linux-0a2c52a9a2f55e80fee6a10a846cadab590dc918.tar.xz | |
mm/page_alloc: remove IRQ saving/restoring from pcp locking
Effectively revert commit 038a102535eb ("mm/page_alloc: prevent pcp
corruption with SMP=n"). The original problem is now avoided by
pcp_spin_trylock() always failing on CONFIG_SMP=n, so we do not need to
disable IRQs anymore.
It's not a complete revert, because keeping the pcp_spin_(un)lock()
wrappers is useful. Rename them from _maybe_irqsave/restore to _nopin.
The difference from pcp_spin_trylock()/pcp_spin_unlock() is that the
_nopin variants don't perform pcpu_task_pin/unpin().
Link: https://lkml.kernel.org/r/20260227-b4-pcp-locking-cleanup-v1-2-f7e22e603447@kernel.org
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: David Hildenbrand (Arm) <david@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/errqueue.h')
0 files changed, 0 insertions, 0 deletions