+ hugetlb-remove-unused-hstate-in-hugetlb_fault_mutex_hash.patch added to -mm tree

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The patch titled
     Subject: hugetlb: remove unused hstate in hugetlb_fault_mutex_hash()
has been added to the -mm tree.  Its filename is
     hugetlb-remove-unused-hstate-in-hugetlb_fault_mutex_hash.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/hugetlb-remove-unused-hstate-in-hugetlb_fault_mutex_hash.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/hugetlb-remove-unused-hstate-in-hugetlb_fault_mutex_hash.patch

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------------------------------------------------------
From: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Subject: hugetlb: remove unused hstate in hugetlb_fault_mutex_hash()

The first parameter hstate in function hugetlb_fault_mutex_hash() is not
used anymore.

This patch removes it.

Link: http://lkml.kernel.org/r/20191005003302.785-1-richardw.yang@xxxxxxxxxxxxxxx
Signed-off-by: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Suggested-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/hugetlb.c     |   10 ++++------
 mm/userfaultfd.c |    5 +----
 2 files changed, 5 insertions(+), 10 deletions(-)

--- a/mm/hugetlb.c~hugetlb-remove-unused-hstate-in-hugetlb_fault_mutex_hash
+++ a/mm/hugetlb.c
@@ -3870,7 +3870,7 @@ retry:
 			 * handling userfault.  Reacquire after handling
 			 * fault to make calling code simpler.
 			 */
-			hash = hugetlb_fault_mutex_hash(h, mapping, idx);
+			hash = hugetlb_fault_mutex_hash(mapping, idx);
 			mutex_unlock(&hugetlb_fault_mutex_table[hash]);
 			ret = handle_userfault(&vmf, VM_UFFD_MISSING);
 			mutex_lock(&hugetlb_fault_mutex_table[hash]);
@@ -3997,8 +3997,7 @@ backout_unlocked:
 }
 
 #ifdef CONFIG_SMP
-u32 hugetlb_fault_mutex_hash(struct hstate *h, struct address_space *mapping,
-			    pgoff_t idx)
+u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx)
 {
 	unsigned long key[2];
 	u32 hash;
@@ -4015,8 +4014,7 @@ u32 hugetlb_fault_mutex_hash(struct hsta
  * For uniprocesor systems we always use a single mutex, so just
  * return 0 and avoid the hashing overhead.
  */
-u32 hugetlb_fault_mutex_hash(struct hstate *h, struct address_space *mapping,
-			    pgoff_t idx)
+u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx)
 {
 	return 0;
 }
@@ -4060,7 +4058,7 @@ vm_fault_t hugetlb_fault(struct mm_struc
 	 * get spurious allocation failures if two CPUs race to instantiate
 	 * the same page in the page cache.
 	 */
-	hash = hugetlb_fault_mutex_hash(h, mapping, idx);
+	hash = hugetlb_fault_mutex_hash(mapping, idx);
 	mutex_lock(&hugetlb_fault_mutex_table[hash]);
 
 	entry = huge_ptep_get(ptep);
--- a/mm/userfaultfd.c~hugetlb-remove-unused-hstate-in-hugetlb_fault_mutex_hash
+++ a/mm/userfaultfd.c
@@ -184,7 +184,6 @@ static __always_inline ssize_t __mcopy_a
 	unsigned long src_addr, dst_addr;
 	long copied;
 	struct page *page;
-	struct hstate *h;
 	unsigned long vma_hpagesize;
 	pgoff_t idx;
 	u32 hash;
@@ -256,8 +255,6 @@ retry:
 			goto out_unlock;
 	}
 
-	h = hstate_vma(dst_vma);
-
 	while (src_addr < src_start + len) {
 		pte_t dst_pteval;
 
@@ -269,7 +266,7 @@ retry:
 		 */
 		idx = linear_page_index(dst_vma, dst_addr);
 		mapping = dst_vma->vm_file->f_mapping;
-		hash = hugetlb_fault_mutex_hash(h, mapping, idx);
+		hash = hugetlb_fault_mutex_hash(mapping, idx);
 		mutex_lock(&hugetlb_fault_mutex_table[hash]);
 
 		err = -ENOMEM;
_

Patches currently in -mm which might be from richardw.yang@xxxxxxxxxxxxxxx are

mm-fix-typo-in-the-comment-when-calling-function-__setpageuptodate.patch
mm-mmapc-remove-a-never-trigger-warning-in-__vma_adjust.patch
hugetlb-remove-unused-hstate-in-hugetlb_fault_mutex_hash.patch
userfaultfd-use-vma_pagesize-for-all-huge-page-size-calculation.patch
userfaultfd-remove-unnecessary-warn_on-in-__mcopy_atomic_hugetlb.patch
userfaultfd-wrap-the-common-dst_vma-check-into-an-inlined-function.patch
fs-userfaultfdc-simplify-the-calculation-of-new_flags.patch




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