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mm: replace set_pte_at_notify() with just set_pte_at() 

With the demise of the .change_pte() MMU notifier callback, there is no
notification happening in set_pte_at_notify().  It is a synonym of
set_pte_at() and can be replaced with it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240405115815.3226315-5-pbonzini@redhat.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-04-05 07:58:15 -04:00
parent 997308f9ae
commit f7842747d1
5 changed files with 8 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/mmu_notifier.h
View File

@ -657,6 +657,4 @@ static inline void mmu_notifier_synchronize(void)
#endif /* CONFIG_MMU_NOTIFIER */
#define set_pte_at_notify set_pte_at
#endif /* _LINUX_MMU_NOTIFIER_H */

6
kernel/events/uprobes.c
View File

@ -18,7 +18,7 @@
#include <linux/sched/coredump.h>
#include <linux/export.h>
#include <linux/rmap.h> /* anon_vma_prepare */
#include <linux/mmu_notifier.h> /* set_pte_at_notify */
#include <linux/mmu_notifier.h>
#include <linux/swap.h> /* folio_free_swap */
#include <linux/ptrace.h> /* user_enable_single_step */
#include <linux/kdebug.h> /* notifier mechanism */
@ -195,8 +195,8 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
flush_cache_page(vma, addr, pte_pfn(ptep_get(pvmw.pte)));
ptep_clear_flush(vma, addr, pvmw.pte);
if (new_page)
set_pte_at_notify(mm, addr, pvmw.pte,
mk_pte(new_page, vma->vm_page_prot));
set_pte_at(mm, addr, pvmw.pte,
mk_pte(new_page, vma->vm_page_prot));
folio_remove_rmap_pte(old_folio, old_page, vma);
if (!folio_mapped(old_folio))

4
mm/ksm.c
View File

@ -1345,7 +1345,7 @@ static int write_protect_page(struct vm_area_struct *vma, struct page *page,
if (pte_write(entry))
entry = pte_wrprotect(entry);
set_pte_at_notify(mm, pvmw.address, pvmw.pte, entry);
set_pte_at(mm, pvmw.address, pvmw.pte, entry);
}
*orig_pte = entry;
err = 0;
@ -1447,7 +1447,7 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
* See Documentation/mm/mmu_notifier.rst
*/
ptep_clear_flush(vma, addr, ptep);
set_pte_at_notify(mm, addr, ptep, newpte);
set_pte_at(mm, addr, ptep, newpte);
folio = page_folio(page);
folio_remove_rmap_pte(folio, page, vma);

7
mm/memory.c
View File

@ -3327,13 +3327,8 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
ptep_clear_flush(vma, vmf->address, vmf->pte);
folio_add_new_anon_rmap(new_folio, vma, vmf->address);
folio_add_lru_vma(new_folio, vma);
/*
* We call the notify macro here because, when using secondary
* mmu page tables (such as kvm shadow page tables), we want the
* new page to be mapped directly into the secondary page table.
*/
BUG_ON(unshare && pte_write(entry));
set_pte_at_notify(mm, vmf->address, vmf->pte, entry);
set_pte_at(mm, vmf->address, vmf->pte, entry);
update_mmu_cache_range(vmf, vma, vmf->address, vmf->pte, 1);
if (old_folio) {
/*

8
mm/migrate_device.c
View File

@ -664,13 +664,9 @@ static void migrate_vma_insert_page(struct migrate_vma *migrate,
if (flush) {
flush_cache_page(vma, addr, pte_pfn(orig_pte));
ptep_clear_flush(vma, addr, ptep);
set_pte_at_notify(mm, addr, ptep, entry);
update_mmu_cache(vma, addr, ptep);
} else {
/* No need to invalidate - it was non-present before */
set_pte_at(mm, addr, ptep, entry);
update_mmu_cache(vma, addr, ptep);
}
set_pte_at(mm, addr, ptep, entry);
update_mmu_cache(vma, addr, ptep);
pte_unmap_unlock(ptep, ptl);
*src = MIGRATE_PFN_MIGRATE;