From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Nicholas Piggin <npiggin@gmail.com>,
"Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
Peter Zijlstra <peterz@infradead.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 5.9 07/23] kernel/cpu: add arch override for clear_tasks_mm_cpumask() mm handling
Date: Sat, 12 Dec 2020 11:07:48 -0500 [thread overview]
Message-ID: <20201212160804.2334982-7-sashal@kernel.org> (raw)
In-Reply-To: <20201212160804.2334982-1-sashal@kernel.org>
From: Nicholas Piggin <npiggin@gmail.com>
[ Upstream commit 8ff00399b153440c1c83e20c43020385b416415b ]
powerpc/64s keeps a counter in the mm which counts bits set in
mm_cpumask as well as other things. This means it can't use generic code
to clear bits out of the mask and doesn't adjust the arch specific
counter.
Add an arch override that allows powerpc/64s to use
clear_tasks_mm_cpumask().
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201126102530.691335-4-npiggin@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
kernel/cpu.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 6ff2578ecf17d..2b8d7a5db3837 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -815,6 +815,10 @@ void __init cpuhp_threads_init(void)
}
#ifdef CONFIG_HOTPLUG_CPU
+#ifndef arch_clear_mm_cpumask_cpu
+#define arch_clear_mm_cpumask_cpu(cpu, mm) cpumask_clear_cpu(cpu, mm_cpumask(mm))
+#endif
+
/**
* clear_tasks_mm_cpumask - Safely clear tasks' mm_cpumask for a CPU
* @cpu: a CPU id
@@ -850,7 +854,7 @@ void clear_tasks_mm_cpumask(int cpu)
t = find_lock_task_mm(p);
if (!t)
continue;
- cpumask_clear_cpu(cpu, mm_cpumask(t->mm));
+ arch_clear_mm_cpumask_cpu(cpu, t->mm);
task_unlock(t);
}
rcu_read_unlock();
--
2.27.0
next prev parent reply other threads:[~2020-12-12 16:11 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-12 16:07 [PATCH AUTOSEL 5.9 01/23] drm/tegra: sor: Don't warn on probe deferral Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 02/23] drm/tegra: sor: Ensure regulators are disabled on teardown Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 03/23] drm/tegra: replace idr_init() by idr_init_base() Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 04/23] dm integrity: don't use drivers that have CRYPTO_ALG_ALLOCATES_MEMORY Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 05/23] gfs2: set lockdep subclass for iopen glocks Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 06/23] ASoC: rt5682: change SAR voltage threshold Sasha Levin
2020-12-12 16:07 ` Sasha Levin [this message]
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 08/23] drm/tegra: sor: Disable clocks on error in tegra_sor_init() Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 09/23] selftests: tc-testing: enable CONFIG_NET_SCH_RED as a module Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 10/23] habanalabs: free host huge va_range if not used Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 11/23] habanalabs: put devices before driver removal Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 12/23] arm64: syscall: exit userspace before unmasking exceptions Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 13/23] vxlan: Add needed_headroom for lower device Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 14/23] vxlan: Copy needed_tailroom from lowerdev Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 15/23] scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback() Sasha Levin
2020-12-12 18:09 ` Andrea Parri
2020-12-13 14:05 ` Sasha Levin
2020-12-14 11:07 ` Dan Carpenter
2020-12-14 13:06 ` Konstantin Ryabitsev
2020-12-14 18:29 ` Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 16/23] scsi: mpt3sas: Increase IOCInit request timeout to 30s Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 17/23] dm table: Remove BUG_ON(in_interrupt()) Sasha Levin
2020-12-12 16:07 ` [PATCH AUTOSEL 5.9 18/23] iwlwifi: pcie: add one missing entry for AX210 Sasha Levin
2020-12-12 16:08 ` [PATCH AUTOSEL 5.9 19/23] iwlwifi: pcie: add some missing entries " Sasha Levin
2020-12-12 16:08 ` [PATCH AUTOSEL 5.9 20/23] drm/amd/display: Init clock value by current vbios CLKs Sasha Levin
2020-12-12 16:08 ` [PATCH AUTOSEL 5.9 21/23] perf/x86/intel: Check PEBS status correctly Sasha Levin
2020-12-12 16:08 ` [PATCH AUTOSEL 5.9 22/23] kbuild: avoid split lines in .mod files Sasha Levin
2020-12-12 16:08 ` [PATCH AUTOSEL 5.9 23/23] tools/testing/selftests/vm: fix build error Sasha Levin
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