| Message ID | 20240404163642.1125529-5-david@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | s390: page_mapcount(), page_has_private() and PG_arch_1 | expand |
On Thu, 4 Apr 2024 18:36:41 +0200 David Hildenbrand <david@redhat.com> wrote: > We removed the usage of PG_arch_1 for page tables in commit > a51324c430db ("s390/cmma: rework no-dat handling"). > > Let's update the comment in UV to reflect that. > > Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> > --- > arch/s390/kernel/uv.c | 9 ++++----- > 1 file changed, 4 insertions(+), 5 deletions(-) > > diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c > index 9c0113b26735..76fc61333fae 100644 > --- a/arch/s390/kernel/uv.c > +++ b/arch/s390/kernel/uv.c > @@ -471,13 +471,12 @@ int arch_make_page_accessible(struct page *page) > return 0; > > /* > - * PG_arch_1 is used in 3 places: > - * 1. for kernel page tables during early boot > - * 2. for storage keys of huge pages and KVM > - * 3. As an indication that this small folio might be secure. This can > + * PG_arch_1 is used in 2 places: > + * 1. for storage keys of hugetlb folios and KVM > + * 2. As an indication that this small folio might be secure. This can > * overindicate, e.g. we set the bit before calling > * convert_to_secure. > - * As secure pages are never huge, all 3 variants can co-exists. > + * As secure pages are never large folios, both variants can co-exists. > */ > if (!test_bit(PG_arch_1, &folio->flags)) > return 0;
diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index 9c0113b26735..76fc61333fae 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -471,13 +471,12 @@ int arch_make_page_accessible(struct page *page) return 0; /* - * PG_arch_1 is used in 3 places: - * 1. for kernel page tables during early boot - * 2. for storage keys of huge pages and KVM - * 3. As an indication that this small folio might be secure. This can + * PG_arch_1 is used in 2 places: + * 1. for storage keys of hugetlb folios and KVM + * 2. As an indication that this small folio might be secure. This can * overindicate, e.g. we set the bit before calling * convert_to_secure. - * As secure pages are never huge, all 3 variants can co-exists. + * As secure pages are never large folios, both variants can co-exists. */ if (!test_bit(PG_arch_1, &folio->flags)) return 0;
We removed the usage of PG_arch_1 for page tables in commit a51324c430db ("s390/cmma: rework no-dat handling"). Let's update the comment in UV to reflect that. Signed-off-by: David Hildenbrand <david@redhat.com> --- arch/s390/kernel/uv.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)