The patch titled
Subject: x86/mm: always pass NULL as the first argument of switch_mm_irqs_off()
has been added to the -mm mm-unstable branch. Its filename is
x86-mm-always-pass-null-as-the-first-argument-of-switch_mm_irqs_off.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/x86-mm-always-pass-null-as-the-first-argument-of-switch_mm_irqs_off.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
Subject: x86/mm: always pass NULL as the first argument of switch_mm_irqs_off()
Date: Thu, 22 Feb 2024 19:09:11 +0000
The first argument of switch_mm_irqs_off() is unused by the x86
implementation. Make sure that x86 code never passes a non-NULL value to
make this clear. Update the only non violating caller, switch_mm().
Link: https://lkml.kernel.org/r/20240222190911.1903054-2-yosryahmed@xxxxxxxxxx
Signed-off-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
Suggested-by: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/tlb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/mm/tlb.c~x86-mm-always-pass-null-as-the-first-argument-of-switch_mm_irqs_off
+++ a/arch/x86/mm/tlb.c
@@ -327,7 +327,7 @@ void switch_mm(struct mm_struct *prev, s
unsigned long flags;
local_irq_save(flags);
- switch_mm_irqs_off(prev, next, tsk);
+ switch_mm_irqs_off(NULL, next, tsk);
local_irq_restore(flags);
}
_
Patches currently in -mm which might be from yosryahmed@xxxxxxxxxx are
x86-mm-further-clarify-switch_mm_irqs_off-documentation.patch
x86-mm-always-pass-null-as-the-first-argument-of-switch_mm_irqs_off.patch
