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authorAndy Lutomirski <luto@kernel.org>2017-05-28 20:00:14 +0300
committerIngo Molnar <mingo@kernel.org>2017-06-05 10:59:44 +0300
commitce4a4e565f5264909a18c733b864c3f74467f69e (patch)
treed795fc0ca4e922ca10a57c0ac835cd5f005892ee /arch/x86/include/asm/tlbbatch.h
parent3f79e4c7c9c2f5c30751ea5c8dd9fd1d56b81947 (diff)
downloadlinux-ce4a4e565f5264909a18c733b864c3f74467f69e.tar.xz
x86/mm: Remove the UP asm/tlbflush.h code, always use the (formerly) SMP code
The UP asm/tlbflush.h generates somewhat nicer code than the SMP version. Aside from that, it's fallen quite a bit behind the SMP code: - flush_tlb_mm_range() didn't flush individual pages if the range was small. - The lazy TLB code was much weaker. This usually wouldn't matter, but, if a kernel thread flushed its lazy "active_mm" more than once (due to reclaim or similar), it wouldn't be unlazied and would instead pointlessly flush repeatedly. - Tracepoints were missing. Aside from that, simply having the UP code around was a maintanence burden, since it means that any change to the TLB flush code had to make sure not to break it. Simplify everything by deleting the UP code. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Borislav Petkov <bpetkov@suse.de> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Michal Hocko <mhocko@suse.com> Cc: Nadav Amit <nadav.amit@gmail.com> Cc: Nadav Amit <namit@vmware.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mm@kvack.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/tlbbatch.h')
-rw-r--r--arch/x86/include/asm/tlbbatch.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/include/asm/tlbbatch.h b/arch/x86/include/asm/tlbbatch.h
index 01a6de16fb96..f4a6ff352a0e 100644
--- a/arch/x86/include/asm/tlbbatch.h
+++ b/arch/x86/include/asm/tlbbatch.h
@@ -3,7 +3,6 @@
#include <linux/cpumask.h>
-#ifdef CONFIG_SMP
struct arch_tlbflush_unmap_batch {
/*
* Each bit set is a CPU that potentially has a TLB entry for one of
@@ -11,6 +10,5 @@ struct arch_tlbflush_unmap_batch {
*/
struct cpumask cpumask;
};
-#endif
#endif /* _ARCH_X86_TLBBATCH_H */