[PATCH V4 02/26] mm/mmap: Define DECLARE_VM_GET_PAGE_PROT
From: Anshuman Khandual <hidden>
Date: 2022-06-24 04:44:34
Also in:
linux-alpha, linux-arm-kernel, linux-m68k, linux-mips, linux-mm, linux-riscv, linux-s390, linux-sh, linux-um, lkml, sparclinux
Subsystem:
memory management, memory management - core, memory mapping, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Liam R. Howlett, Lorenzo Stoakes, Linus Torvalds
This just converts the generic vm_get_page_prot() implementation into a new macro i.e DECLARE_VM_GET_PAGE_PROT which later can be used across platforms when enabling them with ARCH_HAS_VM_GET_PAGE_PROT. This does not create any functional change. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Suggested-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Anshuman Khandual <redacted> --- include/linux/mm.h | 8 ++++++++ mm/mmap.c | 6 +----- 2 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 47bfe038d46e..237828c2bae2 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -428,6 +428,14 @@ extern unsigned int kobjsize(const void *objp); extern pgprot_t protection_map[16]; #endif +#define DECLARE_VM_GET_PAGE_PROT \ +pgprot_t vm_get_page_prot(unsigned long vm_flags) \ +{ \ + return protection_map[vm_flags & \ + (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)]; \ +} \ +EXPORT_SYMBOL(vm_get_page_prot); + /* * The default fault flags that should be used by most of the * arch-specific page fault handlers.
diff --git a/mm/mmap.c b/mm/mmap.c
index b01f0280bda2..55c30aee3999 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c@@ -123,11 +123,7 @@ pgprot_t protection_map[16] __ro_after_init = { #endif #ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT -pgprot_t vm_get_page_prot(unsigned long vm_flags) -{ - return protection_map[vm_flags & (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)]; -} -EXPORT_SYMBOL(vm_get_page_prot); +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)
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2.25.1