The patch titled
Subject: powerpc: mm: add pud_pfn() stub
has been added to the -mm mm-unstable branch. Its filename is
powerpc-mm-add-pud_pfn-stub.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/powerpc-mm-add-pud_pfn-stub.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Rohan McLure <rmclure@xxxxxxxxxxxxx>
Subject: powerpc: mm: add pud_pfn() stub
Date: Wed, 12 Feb 2025 03:14:01 +1100
The page table check feature requires that pud_pfn() be defined on each
consuming architecture. Since only 64-bit, Book3S platforms allow for
hugepages at this upper level, and since the calling code is gated by a
call to pud_user_accessible_page(), which will return zero, include this
stub as a BUILD_BUG().
Link: https://lkml.kernel.org/r/20250211161404.850215-9-ajd@xxxxxxxxxxxxx
Signed-off-by: Rohan McLure <rmclure@xxxxxxxxxxxxx>
Signed-off-by: Andrew Donnellan <ajd@xxxxxxxxxxxxx>
Reviewed-by: Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Sweet Tea Dorminy <sweettea-kernel@xxxxxxxxxx>
Cc: <x86@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/pgtable.h | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/arch/powerpc/include/asm/pgtable.h~powerpc-mm-add-pud_pfn-stub
+++ a/arch/powerpc/include/asm/pgtable.h
@@ -215,6 +215,15 @@ static inline bool arch_supports_memmap_
#endif /* CONFIG_PPC64 */
+#ifndef pud_pfn
+#define pud_pfn pud_pfn
+static inline int pud_pfn(pud_t pud)
+{
+ BUILD_BUG();
+ return 0;
+}
+#endif
+
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_PGTABLE_H */
_
Patches currently in -mm which might be from rmclure@xxxxxxxxxxxxx are
mm-page_table_check-reinstate-address-parameter-in-page_table_check_pud_set.patch
mm-page_table_check-reinstate-address-parameter-in-page_table_check_pmd_set.patch
mm-page_table_check-provide-addr-parameter-to-page_table_check_pte_set.patch
mm-page_table_check-reinstate-address-parameter-in-page_table_check_pud_clear.patch
mm-page_table_check-reinstate-address-parameter-in-page_table_check_pmd_clear.patch
mm-page_table_check-reinstate-address-parameter-in-page_table_check_pte_clear.patch
mm-provide-address-parameter-to-ptemdud_user_accessible_page.patch
powerpc-mm-add-pud_pfn-stub.patch
powerpc-mm-implement-_user_accessible_page-for-ptes.patch
powerpc-mm-use-set_pte_at_unchecked-for-internal-usages.patch
powerpc-mm-support-page-table-check.patch
