• Andy Lutomirski's avatar
    x86/mm: Remove the UP asm/tlbflush.h code, always use the (formerly) SMP code · ce4a4e56
    Andy Lutomirski authored
    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: default avatarAndy 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: default avatarIngo Molnar <mingo@kernel.org>
    ce4a4e56
hardirq.h 1.67 KB