mm/mmap: drop ARCH_HAS_VM_GET_PAGE_PROT

Now all the platforms enable ARCH_HAS_GET_PAGE_PROT.  They define and
export own vm_get_page_prot() whether custom or standard
DECLARE_VM_GET_PAGE_PROT.  Hence there is no need for default generic
fallback for vm_get_page_prot().  Just drop this fallback and also
ARCH_HAS_GET_PAGE_PROT mechanism.

Link: https://lkml.kernel.org/r/20220711070600.2378316-27-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Brian Cain <bcain@quicinc.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2 files changed, 0 insertions, 25 deletions

diff --git a/mm/Kconfig b/mm/Kconfig
index c1fa4993a56f..56ca0e7c6f9a 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -951,9 +951,6 @@ config ARCH_HAS_CURRENT_STACK_POINTER
 	  register alias named "current_stack_pointer", this config can be
 	  selected.
 
-config ARCH_HAS_VM_GET_PAGE_PROT
-	bool
-
 config ARCH_HAS_PTE_DEVMAP
 	bool
 
diff --git a/mm/mmap.c b/mm/mmap.c
index 2a58a9cd0752..edf27a2789a2 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -81,28 +81,6 @@ static void unmap_region(struct mm_struct *mm,
 		struct vm_area_struct *vma, struct vm_area_struct *prev,
 		unsigned long start, unsigned long end);
 
-#ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT
-pgprot_t protection_map[16] __ro_after_init = {
-	[VM_NONE]					= __P000,
-	[VM_READ]					= __P001,
-	[VM_WRITE]					= __P010,
-	[VM_WRITE | VM_READ]				= __P011,
-	[VM_EXEC]					= __P100,
-	[VM_EXEC | VM_READ]				= __P101,
-	[VM_EXEC | VM_WRITE]				= __P110,
-	[VM_EXEC | VM_WRITE | VM_READ]			= __P111,
-	[VM_SHARED]					= __S000,
-	[VM_SHARED | VM_READ]				= __S001,
-	[VM_SHARED | VM_WRITE]				= __S010,
-	[VM_SHARED | VM_WRITE | VM_READ]		= __S011,
-	[VM_SHARED | VM_EXEC]				= __S100,
-	[VM_SHARED | VM_EXEC | VM_READ]			= __S101,
-	[VM_SHARED | VM_EXEC | VM_WRITE]		= __S110,
-	[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ]	= __S111
-};
-DECLARE_VM_GET_PAGE_PROT
-#endif	/* CONFIG_ARCH_HAS_VM_GET_PAGE_PROT */
-
 static pgprot_t vm_pgprot_modify(pgprot_t oldprot, unsigned long vm_flags)
 {
 	return pgprot_modify(oldprot, vm_get_page_prot(vm_flags));