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x86/mm: Remove reset_lazy_tlbstate()

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The only call site also calls idle_task_exit(), and idle_task_exit()
puts us into a clean state by explicitly switching to init_mm.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/3acc7ad02a2ec060d2321a1e0f6de1cb90069517.1498022414.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Andy Lutomirski 2017-06-20 22:22:09 -07:00 committed by Ingo Molnar
parent 7353425881
commit d54368127a
2 changed files with 0 additions and 9 deletions
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8
arch/x86/include/asm/tlbflush.h
View File

@ -259,14 +259,6 @@ void native_flush_tlb_others(const struct cpumask *cpumask,
#define TLBSTATE_OK 1
#define TLBSTATE_LAZY 2
static inline void reset_lazy_tlbstate(void)
{
this_cpu_write(cpu_tlbstate.state, 0);
this_cpu_write(cpu_tlbstate.loaded_mm, &init_mm);
WARN_ON(read_cr3_pa() != __pa_symbol(swapper_pg_dir));
}
static inline void arch_tlbbatch_add_mm(struct arch_tlbflush_unmap_batch *batch,
struct mm_struct *mm)
{

1
arch/x86/kernel/smpboot.c
View File

@ -1589,7 +1589,6 @@ void native_cpu_die(unsigned int cpu)
void play_dead_common(void)
{
idle_task_exit();
reset_lazy_tlbstate();
/* Ack it */
(void)cpu_report_death();