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Groups > linux.kernel > #1317563
| From | <mika.penttila@nextfour.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 1/2 v2] arm, arm64: change_memory_common with numpages == 0 should be no-op. |
| Date | 2016-01-26 07:40 +0100 |
| Message-ID | <qV5se-86A-7@gated-at.bofh.it> (permalink) |
| References | <qV5se-86A-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Mika Penttilä <mika.penttila@nextfour.com> This makes the caller set_memory_xx() consistent with x86. arm64 part is rebased on 4.5.0-rc1 with Ard's patch lkml.kernel.org/g/<1453125665-26627-1-git-send-email-ard.biesheuvel@linaro.org> applied. Signed-off-by: Mika Penttilä mika.penttila@nextfour.com Reviewed-by: Laura Abbott <labbott@redhat.com> Acked-by: David Rientjes <rientjes@google.com> --- arch/arm/mm/pageattr.c | 3 +++ arch/arm64/mm/pageattr.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/arch/arm/mm/pageattr.c b/arch/arm/mm/pageattr.c index cf30daf..d19b1ad 100644 --- a/arch/arm/mm/pageattr.c +++ b/arch/arm/mm/pageattr.c @@ -49,6 +49,9 @@ static int change_memory_common(unsigned long addr, int numpages, WARN_ON_ONCE(1); } + if (!numpages) + return 0; + if (start < MODULES_VADDR || start >= MODULES_END) return -EINVAL; diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c index 1360a02..b582fc2 100644 --- a/arch/arm64/mm/pageattr.c +++ b/arch/arm64/mm/pageattr.c @@ -53,6 +53,9 @@ static int change_memory_common(unsigned long addr, int numpages, WARN_ON_ONCE(1); } + if (!numpages) + return 0; + /* * Kernel VA mappings are always live, and splitting live section * mappings into page mappings may cause TLB conflicts. This means -- 1.9.1
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[PATCH 0/2 v2] set_memory_xx fixes <mika.penttila@nextfour.com> - 2016-01-26 07:40 +0100 [PATCH 1/2 v2] arm, arm64: change_memory_common with numpages == 0 should be no-op. <mika.penttila@nextfour.com> - 2016-01-26 07:40 +0100 [PATCH 2/2 v2] make apply_to_page_range() more robust. <mika.penttila@nextfour.com> - 2016-01-26 07:40 +0100 Re: [PATCH 0/2 v2] set_memory_xx fixes Russell King - ARM Linux <linux@arm.linux.org.uk> - 2016-01-26 15:40 +0100
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