mm, thp: remove infrastructure for handling splitting PMDs

With new refcounting we don't need to mark PMDs splitting.  Let's drop
code to handle this.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Sasha Levin <sasha.levin@oracle.com>
Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Jerome Marchand <jmarchan@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index b74e7dec37dd..65a1b6c69c11 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -602,7 +602,7 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
         pte_t *pte;
         spinlock_t *ptl;
 
-        if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) {
+        if (pmd_trans_huge_lock(pmd, vma, &ptl)) {
                 smaps_pmd_entry(pmd, addr, walk);
                 spin_unlock(ptl);
                 return 0;
@@ -913,7 +913,7 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
         spinlock_t *ptl;
         struct page *page;
 
-        if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) {
+        if (pmd_trans_huge_lock(pmd, vma, &ptl)) {
                 if (cp->type == CLEAR_REFS_SOFT_DIRTY) {
                         clear_soft_dirty_pmd(vma, addr, pmd);
                         goto out;
@@ -1187,7 +1187,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end,
         int err = 0;
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-        if (pmd_trans_huge_lock(pmdp, vma, &ptl) == 1) {
+        if (pmd_trans_huge_lock(pmdp, vma, &ptl)) {
                 u64 flags = 0, frame = 0;
                 pmd_t pmd = *pmdp;
 
@@ -1519,7 +1519,7 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
         pte_t *orig_pte;
         pte_t *pte;
 
-        if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) {
+        if (pmd_trans_huge_lock(pmd, vma, &ptl)) {
                 pte_t huge_pte = *(pte_t *)pmd;
                 struct page *page;