Ything-RepoMirrors/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-01-25 07:47:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

lib/test_hmm: make dmirror_atomic_map() consume a single page

Browse Source 
Patch series "mm: cleanups for device-exclusive entries (hmm)", v2.

Some smaller device-exclusive cleanups I have lying around.


This patch (of 5):

The caller now always passes a single page; let's simplify, and return "0"
on success.

Link: https://lkml.kernel.org/r/20250226132257.2826043-1-david@redhat.com
Link: https://lkml.kernel.org/r/20250226132257.2826043-2-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
David Hildenbrand
2025-02-26 14:22:53 +01:00
committed by Andrew Morton
parent 173a3dc051
commit 66add5e909
1 changed files with 10 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
lib/test_hmm.c
View File

@@ -706,34 +706,23 @@ static int dmirror_check_atomic(struct dmirror *dmirror, unsigned long start,
return 0;
}
static int dmirror_atomic_map(unsigned long start, unsigned long end,
struct page **pages, struct dmirror *dmirror)
static int dmirror_atomic_map(unsigned long addr, struct page *page,
struct dmirror *dmirror)
{
unsigned long pfn, mapped = 0;
int i;
void *entry;
/* Map the migrated pages into the device's page tables. */
mutex_lock(&dmirror->mutex);
for (i = 0, pfn = start >> PAGE_SHIFT; pfn < (end >> PAGE_SHIFT); pfn++, i++) {
void *entry;
if (!pages[i])
continue;
entry = pages[i];
entry = xa_tag_pointer(entry, DPT_XA_TAG_ATOMIC);
entry = xa_store(&dmirror->pt, pfn, entry, GFP_ATOMIC);
if (xa_is_err(entry)) {
mutex_unlock(&dmirror->mutex);
return xa_err(entry);
}
mapped++;
entry = xa_tag_pointer(page, DPT_XA_TAG_ATOMIC);
entry = xa_store(&dmirror->pt, addr >> PAGE_SHIFT, entry, GFP_ATOMIC);
if (xa_is_err(entry)) {
mutex_unlock(&dmirror->mutex);
return xa_err(entry);
}
mutex_unlock(&dmirror->mutex);
return mapped;
return 0;
}
static int dmirror_migrate_finalize_and_map(struct migrate_vma *args,
@@ -803,8 +792,7 @@ static int dmirror_exclusive(struct dmirror *dmirror,
break;
}
ret = dmirror_atomic_map(addr, addr + PAGE_SIZE, &page, dmirror);
ret = ret == 1 ? 0 : -EBUSY;
ret = dmirror_atomic_map(addr, page, dmirror);
folio_unlock(folio);
folio_put(folio);
}