mm: make tlb_flush_pending global

Currently, tlb_flush_pending is used only for CONFIG_[NUMA_BALANCING|
COMPACTION] but upcoming patches to solve subtle TLB flush batching
problem will use it regardless of compaction/NUMA so this patch doesn't
remove the dependency.

[akpm@linux-foundation.org: remove more ifdefs from world's ugliest printk statement]
Link: http://lkml.kernel.org/r/20170802000818.4760-6-namit@vmware.com
Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Nadav Amit <namit@vmware.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index c605f2a3a68eff8c8ed8331f585a185f37b012a9..892a7b0196fd58a64e7df9d49b009020d32f0094 100644 (file)
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -487,14 +487,12 @@ struct mm_struct {
        /* numa_scan_seq prevents two threads setting pte_numa */
        int numa_scan_seq;
 #endif
-#if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION)
        /*
         * An operation with batched TLB flushing is going on. Anything that
         * can move process memory needs to flush the TLB when moving a
         * PROT_NONE or PROT_NUMA mapped page.
         */
        atomic_t tlb_flush_pending;
-#endif
 #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
        /* See flush_tlb_batched_pending() */
        bool tlb_flush_batched;
@@ -528,7 +526,6 @@ extern void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm,
 extern void tlb_finish_mmu(struct mmu_gather *tlb,
                                unsigned long start, unsigned long end);
 
-#if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION)
 /*
  * Memory barriers to keep this state in sync are graciously provided by
  * the page table locks, outside of which no page table modifications happen.
@@ -569,24 +566,6 @@ static inline void dec_tlb_flush_pending(struct mm_struct *mm)
        smp_mb__before_atomic();
        atomic_dec(&mm->tlb_flush_pending);
 }
-#else
-static inline bool mm_tlb_flush_pending(struct mm_struct *mm)
-{
-       return false;
-}
-
-static inline void init_tlb_flush_pending(struct mm_struct *mm)
-{
-}
-
-static inline void inc_tlb_flush_pending(struct mm_struct *mm)
-{
-}
-
-static inline void dec_tlb_flush_pending(struct mm_struct *mm)
-{
-}
-#endif
 
 struct vm_fault;
 

diff --git a/mm/debug.c b/mm/debug.c
index d70103bb4731167da1d32b08aade6257522b405f..5715448ab0b53db5d8bd4b64d47706f7deaaf7a6 100644 (file)
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -124,9 +124,7 @@ void dump_mm(const struct mm_struct *mm)
 #ifdef CONFIG_NUMA_BALANCING
                "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n"
 #endif
-#if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION)
                "tlb_flush_pending %d\n"
-#endif
                "def_flags: %#lx(%pGv)\n",
 
                mm, mm->mmap, mm->vmacache_seqnum, mm->task_size,
@@ -158,9 +156,7 @@ void dump_mm(const struct mm_struct *mm)
 #ifdef CONFIG_NUMA_BALANCING
                mm->numa_next_scan, mm->numa_scan_offset, mm->numa_scan_seq,
 #endif
-#if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION)
                atomic_read(&mm->tlb_flush_pending),
-#endif
                mm->def_flags, &mm->def_flags
        );
 }