[PATCH 1/2 v2] arm, arm64: change_memory_common with numpages == 0 should be no-op.
From: <hidden>
Date: 2016-01-26 06:33:48
Also in:
lkml
Subsystem:
arm port, arm64 port (aarch64 architecture), the rest · Maintainers:
Russell King, Catalin Marinas, Will Deacon, Linus Torvalds
From: Mika PenttilA? <redacted> 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/[off-list ref] applied. Signed-off-by: Mika PenttilA? mika.penttila@nextfour.com Reviewed-by: Laura Abbott <redacted> 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
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1.9.1
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