Laurent Dufour
3010a5ea66
mm: introduce ARCH_HAS_PTE_SPECIAL
...
Currently the PTE special supports is turned on in per architecture
header files. Most of the time, it is defined in
arch/*/include/asm/pgtable.h depending or not on some other per
architecture static definition.
This patch introduce a new configuration variable to manage this
directly in the Kconfig files. It would later replace
__HAVE_ARCH_PTE_SPECIAL.
Here notes for some architecture where the definition of
__HAVE_ARCH_PTE_SPECIAL is not obvious:
arm
__HAVE_ARCH_PTE_SPECIAL which is currently defined in
arch/arm/include/asm/pgtable-3level.h which is included by
arch/arm/include/asm/pgtable.h when CONFIG_ARM_LPAE is set.
So select ARCH_HAS_PTE_SPECIAL if ARM_LPAE.
powerpc
__HAVE_ARCH_PTE_SPECIAL is defined in 2 files:
- arch/powerpc/include/asm/book3s/64/pgtable.h
- arch/powerpc/include/asm/pte-common.h
The first one is included if (PPC_BOOK3S & PPC64) while the second is
included in all the other cases.
So select ARCH_HAS_PTE_SPECIAL all the time.
sparc:
__HAVE_ARCH_PTE_SPECIAL is defined if defined(__sparc__) &&
defined(__arch64__) which are defined through the compiler in
sparc/Makefile if !SPARC32 which I assume to be if SPARC64.
So select ARCH_HAS_PTE_SPECIAL if SPARC64
There is no functional change introduced by this patch.
Link: http://lkml.kernel.org/r/1523433816-14460-2-git-send-email-ldufour@linux.vnet.ibm.com
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com >
Suggested-by: Jerome Glisse <jglisse@redhat.com >
Reviewed-by: Jerome Glisse <jglisse@redhat.com >
Acked-by: David Rientjes <rientjes@google.com >
Cc: Michal Hocko <mhocko@kernel.org >
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com >
Cc: Michael Ellerman <mpe@ellerman.id.au >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Jonathan Corbet <corbet@lwn.net >
Cc: Catalin Marinas <catalin.marinas@arm.com >
Cc: Will Deacon <will.deacon@arm.com >
Cc: Yoshinori Sato <ysato@users.sourceforge.jp >
Cc: Rich Felker <dalias@libc.org >
Cc: David S. Miller <davem@davemloft.net >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: Ingo Molnar <mingo@redhat.com >
Cc: Vineet Gupta <vgupta@synopsys.com >
Cc: Palmer Dabbelt <palmer@sifive.com >
Cc: Albert Ou <albert@sifive.com >
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com >
Cc: Heiko Carstens <heiko.carstens@de.ibm.com >
Cc: David Rientjes <rientjes@google.com >
Cc: Robin Murphy <robin.murphy@arm.com >
Cc: Christophe LEROY <christophe.leroy@c-s.fr >
Signed-off-by: Andrew Morton <akpm@linux-foundation.org >
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org >
2018-06-07 17:34:35 -07:00
