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authorMatthew Wilcox (Oracle) <willy@infradead.org>2022-09-02 22:46:40 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-10-04 00:02:52 +0300
commit5fcd079af9ed4e69cca0a2f77c6255d0eb8a8cca (patch)
treec0a09b88e68eadb1f4aeb2d8f6c2d11dd1c84c95 /kernel/events
parent98b211d6415f9538b81e50da71f09d195ce2afe6 (diff)
downloadlinux-5fcd079af9ed4e69cca0a2f77c6255d0eb8a8cca.tar.xz
uprobes: use folios more widely in __replace_page()
Remove a few hidden calls to compound_head(). Link: https://lkml.kernel.org/r/20220902194653.1739778-45-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/uprobes.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 401bc2d24ce0..70375c7c0c4b 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -19,7 +19,7 @@
#include <linux/export.h>
#include <linux/rmap.h> /* anon_vma_prepare */
#include <linux/mmu_notifier.h> /* set_pte_at_notify */
-#include <linux/swap.h> /* try_to_free_swap */
+#include <linux/swap.h> /* folio_free_swap */
#include <linux/ptrace.h> /* user_enable_single_step */
#include <linux/kdebug.h> /* notifier mechanism */
#include "../../mm/internal.h" /* munlock_vma_page */
@@ -154,8 +154,9 @@ static loff_t vaddr_to_offset(struct vm_area_struct *vma, unsigned long vaddr)
static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
struct page *old_page, struct page *new_page)
{
+ struct folio *old_folio = page_folio(old_page);
struct mm_struct *mm = vma->vm_mm;
- DEFINE_FOLIO_VMA_WALK(pvmw, page_folio(old_page), vma, addr, 0);
+ DEFINE_FOLIO_VMA_WALK(pvmw, old_folio, vma, addr, 0);
int err;
struct mmu_notifier_range range;
@@ -169,8 +170,8 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
return err;
}
- /* For try_to_free_swap() below */
- lock_page(old_page);
+ /* For folio_free_swap() below */
+ folio_lock(old_folio);
mmu_notifier_invalidate_range_start(&range);
err = -EAGAIN;
@@ -186,7 +187,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
/* no new page, just dec_mm_counter for old_page */
dec_mm_counter(mm, MM_ANONPAGES);
- if (!PageAnon(old_page)) {
+ if (!folio_test_anon(old_folio)) {
dec_mm_counter(mm, mm_counter_file(old_page));
inc_mm_counter(mm, MM_ANONPAGES);
}
@@ -198,15 +199,15 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
mk_pte(new_page, vma->vm_page_prot));
page_remove_rmap(old_page, vma, false);
- if (!page_mapped(old_page))
- try_to_free_swap(old_page);
+ if (!folio_mapped(old_folio))
+ folio_free_swap(old_folio);
page_vma_mapped_walk_done(&pvmw);
- put_page(old_page);
+ folio_put(old_folio);
err = 0;
unlock:
mmu_notifier_invalidate_range_end(&range);
- unlock_page(old_page);
+ folio_unlock(old_folio);
return err;
}