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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2016-07-21 11:15:27 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2016-07-21 16:48:37 +0100 |
| commit | e75118a7b581b19b08282c7819c1ec6f68b91b79 (patch) | |
| tree | b2f9b83d8f4627a243c20001ec064e27aad10a01 /arch/arm64/Kconfig | |
| parent | 9113c2aa05e9848cd4f1154abee17d4f265f012d (diff) | |
| download | linux-e75118a7b581b19b08282c7819c1ec6f68b91b79.tar.bz2 | |
arm64: Honor nosmp kernel command line option
Passing "nosmp" should boot the kernel with a single processor, without
provision to enable secondary CPUs even if they are present. "nosmp" is
implemented by setting maxcpus=0. At the moment we still mark the secondary
CPUs present even with nosmp, which allows the userspace to bring them
up. This patch corrects the smp_prepare_cpus() to honor the maxcpus == 0.
Commit 44dbcc93ab67145 ("arm64: Fix behavior of maxcpus=N") fixed the
behavior for maxcpus >= 1, but broke maxcpus = 0.
Fixes: 44dbcc93ab67 ("arm64: Fix behavior of maxcpus=N")
Cc: <stable@vger.kernel.org> # 4.7+
Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
[catalin.marinas@arm.com: updated code comment]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
0 files changed, 0 insertions, 0 deletions