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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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
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>
---
fs/hugetlbfs/inode.c | 4 ++--
include/linux/hugetlb.h | 4 ++--
mm/hugetlb.c | 12 ++++++------
mm/userfaultfd.c | 5 +----
4 files changed, 11 insertions(+), 14 deletions(-)
--- a/fs/hugetlbfs/inode.c~hugetlb-remove-unused-hstate-in-hugetlb_fault_mutex_hash
+++ a/fs/hugetlbfs/inode.c
@@ -440,7 +440,7 @@ static void remove_inode_hugepages(struc
u32 hash;
index = page->index;
- hash = hugetlb_fault_mutex_hash(h, mapping, index, 0);
+ hash = hugetlb_fault_mutex_hash(mapping, index, 0);
mutex_lock(&hugetlb_fault_mutex_table[hash]);
/*
@@ -644,7 +644,7 @@ static long hugetlbfs_fallocate(struct f
addr = index * hpage_size;
/* mutex taken here, fault path and hole punch */
- hash = hugetlb_fault_mutex_hash(h, mapping, index, addr);
+ hash = hugetlb_fault_mutex_hash(mapping, index, addr);
mutex_lock(&hugetlb_fault_mutex_table[hash]);
/* See if already present in mapping to avoid alloc/free */
--- a/include/linux/hugetlb.h~hugetlb-remove-unused-hstate-in-hugetlb_fault_mutex_hash
+++ a/include/linux/hugetlb.h
@@ -105,8 +105,8 @@ void move_hugetlb_state(struct page *old
void free_huge_page(struct page *page);
void hugetlb_fix_reserve_counts(struct inode *inode);
extern struct mutex *hugetlb_fault_mutex_table;
-u32 hugetlb_fault_mutex_hash(struct hstate *h, struct address_space *mapping,
- pgoff_t idx, unsigned long address);
+u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx,
+ unsigned long address);
pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud);
--- 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, haddr);
+ hash = hugetlb_fault_mutex_hash(mapping, idx, haddr);
mutex_unlock(&hugetlb_fault_mutex_table[hash]);
ret = handle_userfault(&vmf, VM_UFFD_MISSING);
mutex_lock(&hugetlb_fault_mutex_table[hash]);
@@ -3997,8 +3997,8 @@ backout_unlocked:
}
#ifdef CONFIG_SMP
-u32 hugetlb_fault_mutex_hash(struct hstate *h, struct address_space *mapping,
- pgoff_t idx, unsigned long address)
+u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx,
+ unsigned long address)
{
unsigned long key[2];
u32 hash;
@@ -4015,8 +4015,8 @@ 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, unsigned long address)
+u32 hugetlb_fault_mutex_hash(struct address_space *mapping, pgoff_t idx,
+ unsigned long address)
{
return 0;
}
@@ -4060,7 +4060,7 @@ 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, haddr);
+ hash = hugetlb_fault_mutex_hash(mapping, idx, haddr);
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, dst_addr);
+ hash = hugetlb_fault_mutex_hash(mapping, idx, dst_addr);
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
