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Message-ID: <20240830040101.822209-14-Liam.Howlett@oracle.com>
Date: Fri, 30 Aug 2024 00:00:53 -0400
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
Suren Baghdasaryan <surenb@...gle.com>,
Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
Matthew Wilcox <willy@...radead.org>, Vlastimil Babka <vbabka@...e.cz>,
sidhartha.kumar@...cle.com, Bert Karwatzki <spasswolf@....de>,
Jiri Olsa <olsajiri@...il.com>, Kees Cook <kees@...nel.org>,
"Paul E . McKenney" <paulmck@...nel.org>,
Jeff Xu <jeffxu@...omium.org>,
"Liam R. Howlett" <Liam.Howlett@...cle.com>
Subject: [PATCH v8 13/21] mm: Clean up unmap_region() argument list
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
With the only caller to unmap_region() being the error path of
mmap_region(), the argument list can be significantly reduced.
Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
---
mm/mmap.c | 3 +--
mm/vma.c | 17 ++++++++---------
mm/vma.h | 6 ++----
3 files changed, 11 insertions(+), 15 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 08cf9199f314..304dc085533a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1615,8 +1615,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
vma_iter_set(&vmi, vma->vm_end);
/* Undo any partial mapping done by a device driver. */
- unmap_region(mm, &vmi.mas, vma, prev, next, vma->vm_start,
- vma->vm_end, vma->vm_end, true);
+ unmap_region(&vmi.mas, vma, prev, next);
}
if (writable_file_mapping)
mapping_unmap_writable(file->f_mapping);
diff --git a/mm/vma.c b/mm/vma.c
index c71dda026191..83c5c46c67b9 100644
--- a/mm/vma.c
+++ b/mm/vma.c
@@ -155,22 +155,21 @@ void remove_vma(struct vm_area_struct *vma, bool unreachable)
*
* Called with the mm semaphore held.
*/
-void unmap_region(struct mm_struct *mm, struct ma_state *mas,
- struct vm_area_struct *vma, struct vm_area_struct *prev,
- struct vm_area_struct *next, unsigned long start,
- unsigned long end, unsigned long tree_end, bool mm_wr_locked)
+void unmap_region(struct ma_state *mas, struct vm_area_struct *vma,
+ struct vm_area_struct *prev, struct vm_area_struct *next)
{
+ struct mm_struct *mm = vma->vm_mm;
struct mmu_gather tlb;
- unsigned long mt_start = mas->index;
lru_add_drain();
tlb_gather_mmu(&tlb, mm);
update_hiwater_rss(mm);
- unmap_vmas(&tlb, mas, vma, start, end, tree_end, mm_wr_locked);
- mas_set(mas, mt_start);
+ unmap_vmas(&tlb, mas, vma, vma->vm_start, vma->vm_end, vma->vm_end,
+ /* mm_wr_locked = */ true);
+ mas_set(mas, vma->vm_end);
free_pgtables(&tlb, mas, vma, prev ? prev->vm_end : FIRST_USER_ADDRESS,
- next ? next->vm_start : USER_PGTABLES_CEILING,
- mm_wr_locked);
+ next ? next->vm_start : USER_PGTABLES_CEILING,
+ /* mm_wr_locked = */ true);
tlb_finish_mmu(&tlb);
}
diff --git a/mm/vma.h b/mm/vma.h
index 8afaa661224d..82ba48174341 100644
--- a/mm/vma.h
+++ b/mm/vma.h
@@ -149,10 +149,8 @@ int do_vmi_munmap(struct vma_iterator *vmi, struct mm_struct *mm,
void remove_vma(struct vm_area_struct *vma, bool unreachable);
-void unmap_region(struct mm_struct *mm, struct ma_state *mas,
- struct vm_area_struct *vma, struct vm_area_struct *prev,
- struct vm_area_struct *next, unsigned long start,
- unsigned long end, unsigned long tree_end, bool mm_wr_locked);
+void unmap_region(struct ma_state *mas, struct vm_area_struct *vma,
+ struct vm_area_struct *prev, struct vm_area_struct *next);
/* Required by mmap_region(). */
bool
--
2.43.0
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