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x86/mm: always pass NULL as the first argument of switch_mm_irqs_off() 

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@google.com
Signed-off-by: Yosry Ahmed <yosryahmed@google.com>
Suggested-by: Dave Hansen <dave.hansen@intel.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Yosry Ahmed 2024-02-22 19:09:11 +00:00 committed by Andrew Morton
parent cd87d9f584
commit 15d1ec74b5
1 changed files with 1 additions and 1 deletions
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2
arch/x86/mm/tlb.c
View File

@ -327,7 +327,7 @@ void switch_mm(struct mm_struct *prev, struct mm_struct *next,
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);
}