[PATCH 0/2] mm/thp: Rename pmd_mknotpresent() as pmd_mknotvalid()

[PATCH 0/2] mm/thp: Rename pmd_mknotpresent() as pmd_mknotvalid()

[Anshuman Khandual]

This series renames pmd_mknotpresent() as pmd_mknotvalid(). Before that it
drops an existing pmd_mknotpresent() definition from powerpc platform which
was never required as it defines it's pmdp_invalidate() through subscribing
__HAVE_ARCH_PMDP_INVALIDATE. This does not create any functional change.

This rename was suggested by Catalin during a previous discussion while we
were trying to change the THP helpers on arm64 platform for migration.

https://patchwork.kernel.org/patch/11019637/

This series is based on v5.6-rc6.

Boot tested on arm64 and x86 platforms.
Built tested on many other platforms including the ones changed here.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: nouveau@lists.freedesktop.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: x86@kernel.org
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org

Anshuman Khandual (2):
  powerpc/mm: Drop platform defined pmd_mknotpresent()
  mm/thp: Rename pmd_mknotpresent() as pmd_mknotvalid()

 arch/arc/include/asm/hugepage.h              | 2 +-
 arch/arm/include/asm/pgtable-3level.h        | 2 +-
 arch/arm64/include/asm/pgtable.h             | 2 +-
 arch/mips/include/asm/pgtable.h              | 2 +-
 arch/powerpc/include/asm/book3s/64/pgtable.h | 4 ----
 arch/x86/include/asm/pgtable.h               | 2 +-
 arch/x86/mm/kmmio.c                          | 2 +-
 mm/pgtable-generic.c                         | 2 +-
 8 files changed, 7 insertions(+), 11 deletions(-)

-- 
2.20.1

[PATCH 1/2] powerpc/mm: Drop platform defined pmd_mknotpresent()

[Anshuman Khandual]

Platform needs to define pmd_mknotpresent() for generic pmdp_invalidate()
only when __HAVE_ARCH_PMDP_INVALIDATE is not subscribed. Otherwise platform
specific pmd_mknotpresent() is not required. Hence just drop it.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 arch/powerpc/include/asm/book3s/64/pgtable.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 201a69e6a355..5d4bc19c2a3c 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1168,10 +1168,6 @@ static inline int pmd_large(pmd_t pmd)
 	return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
 }
 
-static inline pmd_t pmd_mknotpresent(pmd_t pmd)
-{
-	return __pmd(pmd_val(pmd) & ~_PAGE_PRESENT);
-}
 /*
  * For radix we should always find H_PAGE_HASHPTE zero. Hence
  * the below will work for radix too
-- 
2.20.1

Re: [PATCH 0/2] mm/thp: Rename pmd_mknotpresent() as pmd_mknotvalid()

[Anshuman Khandual]

On 03/20/2020 10:24 AM, Anshuman Khandual wrote:
> This series renames pmd_mknotpresent() as pmd_mknotvalid(). Before that it
> drops an existing pmd_mknotpresent() definition from powerpc platform which
> was never required as it defines it's pmdp_invalidate() through subscribing
> __HAVE_ARCH_PMDP_INVALIDATE. This does not create any functional change.
> 
> This rename was suggested by Catalin during a previous discussion while we
> were trying to change the THP helpers on arm64 platform for migration.
> 
> https://patchwork.kernel.org/patch/11019637/
> 
> This series is based on v5.6-rc6.
> 
> Boot tested on arm64 and x86 platforms.
> Built tested on many other platforms including the ones changed here.

Gentle ping, any updates regarding this ?

Re: [PATCH 0/2] mm/thp: Rename pmd_mknotpresent() as pmd_mknotvalid()

[Andrew Morton]

On Sun, 29 Mar 2020 19:12:35 +0530 Anshuman Khandual <anshuman.khandual@arm.com> wrote:

> 
> 
> On 03/20/2020 10:24 AM, Anshuman Khandual wrote:
> > This series renames pmd_mknotpresent() as pmd_mknotvalid(). Before that it
> > drops an existing pmd_mknotpresent() definition from powerpc platform which
> > was never required as it defines it's pmdp_invalidate() through subscribing
> > __HAVE_ARCH_PMDP_INVALIDATE. This does not create any functional change.
> > 
> > This rename was suggested by Catalin during a previous discussion while we
> > were trying to change the THP helpers on arm64 platform for migration.
> > 
> > https://patchwork.kernel.org/patch/11019637/
> > 
> > This series is based on v5.6-rc6.
> > 
> > Boot tested on arm64 and x86 platforms.
> > Built tested on many other platforms including the ones changed here.
> 
> Gentle ping, any updates regarding this ?

We're in the merge window so I have parked this for consideration after
-rc1.