diff options
| author | Liam R. Howlett <Liam.Howlett@Oracle.com> | 2024-08-30 00:00:56 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-03 21:15:51 -0700 |
| commit | 5972d97c44dc00fd9436a885182adef00ae8cb22 (patch) | |
| tree | a7798423f0fc7d714c506b7f6f5bee28610e9a85 /mm/mmap.c | |
| parent | 4f87153e82c4906e917d273ab7accd0d540aab35 (diff) | |
mm/mmap: use PHYS_PFN in mmap_region()
Instead of shifting the length by PAGE_SIZE, use PHYS_PFN. Also use the
existing local variable everywhere instead of some of the time.
Link: https://lkml.kernel.org/r/20240830040101.822209-17-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Cc: Bert Karwatzki <spasswolf@web.de>
Cc: Jeff Xu <jeffxu@chromium.org>
Cc: Jiri Olsa <olsajiri@gmail.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index e1e5c78b6c3c..cd09dd164e85 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1364,7 +1364,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr, struct mm_struct *mm = current->mm; struct vm_area_struct *vma = NULL; struct vm_area_struct *next, *prev, *merge; - pgoff_t pglen = len >> PAGE_SHIFT; + pgoff_t pglen = PHYS_PFN(len); unsigned long charged = 0; struct vma_munmap_struct vms; struct ma_state mas_detach; @@ -1384,7 +1384,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr, * MAP_FIXED may remove pages of mappings that intersects with requested * mapping. Account for the pages it would unmap. */ - if (!may_expand_vm(mm, vm_flags, (len >> PAGE_SHIFT) - nr_pages)) + if (!may_expand_vm(mm, vm_flags, pglen - nr_pages)) return -ENOMEM; /* Find the first overlapping VMA */ @@ -1413,7 +1413,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr, * Private writable mapping: check memory availability */ if (accountable_mapping(file, vm_flags)) { - charged = len >> PAGE_SHIFT; + charged = pglen; charged -= nr_accounted; if (security_vm_enough_memory_mm(mm, charged)) goto abort_munmap; @@ -1574,14 +1574,14 @@ expanded: /* Unmap any existing mapping in the area */ vms_complete_munmap_vmas(&vms, &mas_detach); - vm_stat_account(mm, vm_flags, len >> PAGE_SHIFT); + vm_stat_account(mm, vm_flags, pglen); if (vm_flags & VM_LOCKED) { if ((vm_flags & VM_SPECIAL) || vma_is_dax(vma) || is_vm_hugetlb_page(vma) || vma == get_gate_vma(current->mm)) vm_flags_clear(vma, VM_LOCKED_MASK); else - mm->locked_vm += (len >> PAGE_SHIFT); + mm->locked_vm += pglen; } if (file) |