mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS

There are many platforms with exact same value for VM_DATA_DEFAULT_FLAGS This creates a default value for VM_DATA_DEFAULT_FLAGS in line with the existing VM_STACK_DEFAULT_FLAGS. While here, also define some more macros with standard VMA access flag combinations that are used frequently across many platforms. Apart from simplification, this reduces code duplication as well. Signed-off-by: Anshuman Khandual <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Reviewed-by: Vlastimil Babka <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: Russell King <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Mark Salter <[email protected]> Cc: Guo Ren <[email protected]> Cc: Yoshinori Sato <[email protected]> Cc: Brian Cain <[email protected]> Cc: Tony Luck <[email protected]> Cc: Michal Simek <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Paul Burton <[email protected]> Cc: Nick Hu <[email protected]> Cc: Ley Foon Tan <[email protected]> Cc: Jonas Bonn <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Rich Felker <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Guan Xuetao <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Chris Zankel <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
wangyan0507 · Apr 10, 2020 · c62da0c · c62da0c
1 parent 8cd3984
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diff --git a/arch/alpha/include/asm/page.h b/arch/alpha/include/asm/page.h
@@ -90,9 +90,6 @@ typedef struct page *pgtable_t;
 #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 #endif /* CONFIG_DISCONTIGMEM */
 
-#define VM_DATA_DEFAULT_FLAGS		(VM_READ | VM_WRITE | VM_EXEC | \
-					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
 

diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h
@@ -102,7 +102,7 @@ typedef pte_t * pgtable_t;
 #define virt_addr_valid(kaddr)  pfn_valid(virt_to_pfn(kaddr))
 
 /* Default Permissions for stack/heaps pages (Non Executable) */
-#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_NON_EXEC
 
 #define WANT_PAGE_VIRTUAL   1
 

diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h
@@ -161,9 +161,7 @@ extern int pfn_valid(unsigned long);
 
 #endif /* !__ASSEMBLY__ */
 
-#define VM_DATA_DEFAULT_FLAGS \
-	(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
-	 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
 
 #include <asm-generic/getorder.h>
 

diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h
@@ -36,9 +36,7 @@ extern int pfn_valid(unsigned long);
 
 #endif /* !__ASSEMBLY__ */
 
-#define VM_DATA_DEFAULT_FLAGS \
-	(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
-	 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
 
 #include <asm-generic/getorder.h>
 

diff --git a/arch/c6x/include/asm/page.h b/arch/c6x/include/asm/page.h
@@ -2,10 +2,7 @@
 #ifndef _ASM_C6X_PAGE_H
 #define _ASM_C6X_PAGE_H
 
-#define VM_DATA_DEFAULT_FLAGS \
-	(VM_READ | VM_WRITE | \
-	((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
-		 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
 
 #include <asm-generic/page.h>
 

diff --git a/arch/csky/include/asm/page.h b/arch/csky/include/asm/page.h
@@ -85,9 +85,6 @@ extern unsigned long va_pa_offset;
 				 PHYS_OFFSET_OFFSET)
 #define virt_to_page(x)	(mem_map + MAP_NR(x))
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #define pfn_to_kaddr(x)	__va(PFN_PHYS(x))
 
 #include <asm-generic/memory_model.h>

diff --git a/arch/h8300/include/asm/page.h b/arch/h8300/include/asm/page.h
@@ -6,8 +6,6 @@
 #include <linux/types.h>
 
 #define MAP_NR(addr) (((uintptr_t)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
 #ifndef __ASSEMBLY__
 extern unsigned long rom_length;

diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/page.h
@@ -93,8 +93,7 @@ struct page;
 #define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(__pa(kaddr)))
 
 /* Default vm area behavior is non-executable.  */
-#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
-				VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_NON_EXEC
 
 #define pfn_valid(pfn) ((pfn) < max_mapnr)
 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
@@ -218,10 +218,7 @@ get_order (unsigned long size)
 
 #define PAGE_OFFSET			RGN_BASE(RGN_KERNEL)
 
-#define VM_DATA_DEFAULT_FLAGS		(VM_READ | VM_WRITE |					\
-					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC |		\
-					 (((current->personality & READ_IMPLIES_EXEC) != 0)	\
-					  ? VM_EXEC : 0))
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
 
 #define GATE_ADDR		RGN_BASE(RGN_GATE)
 

diff --git a/arch/m68k/include/asm/page.h b/arch/m68k/include/asm/page.h
@@ -65,9 +65,6 @@ extern unsigned long _ramend;
 #define __phys_to_pfn(paddr)	((unsigned long)((paddr) >> PAGE_SHIFT))
 #define __pfn_to_phys(pfn)	PFN_PHYS(pfn)
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #include <asm-generic/getorder.h>
 
 #endif /* _M68K_PAGE_H */
diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
@@ -194,8 +194,6 @@ extern int page_is_ram(unsigned long pfn);
 
 #ifdef CONFIG_MMU
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 #endif /* CONFIG_MMU */
 
 #endif /* __KERNEL__ */

diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h
@@ -253,10 +253,7 @@ extern bool __virt_addr_valid(const volatile void *kaddr);
 #define virt_addr_valid(kaddr)						\
 	__virt_addr_valid((const volatile void *) (kaddr))
 
-#define VM_DATA_DEFAULT_FLAGS \
-	(VM_READ | VM_WRITE | \
-	 ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
-	 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
 
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>

diff --git a/arch/nds32/include/asm/page.h b/arch/nds32/include/asm/page.h
@@ -59,9 +59,6 @@ typedef struct page *pgtable_t;
 
 #endif /* !__ASSEMBLY__ */
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #endif /* __KERNEL__ */
 
 #endif
diff --git a/arch/nios2/include/asm/page.h b/arch/nios2/include/asm/page.h
@@ -98,8 +98,7 @@ static inline bool pfn_valid(unsigned long pfn)
 # define virt_to_page(vaddr)	pfn_to_page(PFN_DOWN(virt_to_phys(vaddr)))
 # define virt_addr_valid(vaddr)	pfn_valid(PFN_DOWN(virt_to_phys(vaddr)))
 
-# define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+# define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_NON_EXEC
 
 #include <asm-generic/memory_model.h>
 

diff --git a/arch/openrisc/include/asm/page.h b/arch/openrisc/include/asm/page.h
@@ -86,11 +86,6 @@ typedef struct page *pgtable_t;
 
 #endif /* __ASSEMBLY__ */
 
-
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
 

diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
@@ -180,9 +180,6 @@ extern int npmem_ranges;
 #define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
 #include <asm/pdc.h>

diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
@@ -240,13 +240,8 @@ static inline bool pfn_valid(unsigned long pfn)
  * and needs to be executable.  This means the whole heap ends
  * up being executable.
  */
-#define VM_DATA_DEFAULT_FLAGS32 \
-	(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
-				 VM_READ | VM_WRITE | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_DATA_DEFAULT_FLAGS64	(VM_READ | VM_WRITE | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS32	VM_DATA_FLAGS_TSK_EXEC
+#define VM_DATA_DEFAULT_FLAGS64	VM_DATA_FLAGS_NON_EXEC
 
 #ifdef __powerpc64__
 #include <asm/page_64.h>

diff --git a/arch/powerpc/include/asm/page_64.h b/arch/powerpc/include/asm/page_64.h
@@ -94,11 +94,8 @@ extern u64 ppc64_pft_size;
  * stack by default, so in the absence of a PT_GNU_STACK program header
  * we turn execute permission off.
  */
-#define VM_STACK_DEFAULT_FLAGS32	(VM_READ | VM_WRITE | VM_EXEC | \
-					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
-#define VM_STACK_DEFAULT_FLAGS64	(VM_READ | VM_WRITE | \
-					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_STACK_DEFAULT_FLAGS32	VM_DATA_FLAGS_EXEC
+#define VM_STACK_DEFAULT_FLAGS64	VM_DATA_FLAGS_NON_EXEC
 
 #define VM_STACK_DEFAULT_FLAGS \
 	(is_32bit_task() ? \

diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
@@ -137,8 +137,7 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
 
 #define virt_addr_valid(vaddr)	(pfn_valid(virt_to_pfn(vaddr)))
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_NON_EXEC
 
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>

diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
@@ -181,8 +181,7 @@ int arch_make_page_accessible(struct page *page);
 
 #define virt_addr_valid(kaddr)	pfn_valid(virt_to_pfn(kaddr))
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_NON_EXEC
 
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>

diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
@@ -182,9 +182,6 @@ typedef struct page *pgtable_t;
 #endif
 #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
 

diff --git a/arch/sparc/include/asm/page_32.h b/arch/sparc/include/asm/page_32.h
@@ -133,9 +133,6 @@ extern unsigned long pfn_base;
 #define pfn_valid(pfn)		(((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
 #define virt_addr_valid(kaddr)	((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
 

diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h
@@ -158,9 +158,6 @@ extern unsigned long PAGE_OFFSET;
 
 #endif /* !(__ASSEMBLY__) */
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #include <asm-generic/getorder.h>
 
 #endif /* _SPARC64_PAGE_H */
diff --git a/arch/unicore32/include/asm/page.h b/arch/unicore32/include/asm/page.h
@@ -69,9 +69,6 @@ extern int pfn_valid(unsigned long);
 
 #endif /* !__ASSEMBLY__ */
 
-#define VM_DATA_DEFAULT_FLAGS \
-	(VM_READ | VM_WRITE | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #include <asm-generic/getorder.h>
 
 #endif
diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h
@@ -35,9 +35,7 @@
 
 #define PAGE_OFFSET		((unsigned long)__PAGE_OFFSET)
 
-#define VM_DATA_DEFAULT_FLAGS \
-	(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
-	 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
 
 #define __PHYSICAL_START	ALIGN(CONFIG_PHYSICAL_START, \
 				      CONFIG_PHYSICAL_ALIGN)

diff --git a/arch/x86/um/asm/vm-flags.h b/arch/x86/um/asm/vm-flags.h
@@ -9,17 +9,11 @@
 
 #ifdef CONFIG_X86_32
 
-#define VM_DATA_DEFAULT_FLAGS \
-	(VM_READ | VM_WRITE | \
-	((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
-		 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
 
 #else
 
-#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
-	VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-#define VM_STACK_DEFAULT_FLAGS (VM_GROWSDOWN | VM_READ | VM_WRITE | \
-	VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_STACK_DEFAULT_FLAGS (VM_GROWSDOWN | VM_DATA_FLAGS_EXEC)
 
 #endif
 #endif
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
@@ -203,8 +203,5 @@ static inline unsigned long ___pa(unsigned long va)
 
 #endif /* __ASSEMBLY__ */
 
-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-
 #include <asm-generic/memory_model.h>
 #endif /* _XTENSA_PAGE_H */
diff --git a/include/linux/mm.h b/include/linux/mm.h
@@ -343,6 +343,20 @@ extern unsigned int kobjsize(const void *objp);
 /* Bits set in the VMA until the stack is in its final location */
 #define VM_STACK_INCOMPLETE_SETUP	(VM_RAND_READ | VM_SEQ_READ)
 
+#define TASK_EXEC ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0)
+
+/* Common data flag combinations */
+#define VM_DATA_FLAGS_TSK_EXEC	(VM_READ | VM_WRITE | TASK_EXEC | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_FLAGS_NON_EXEC	(VM_READ | VM_WRITE | VM_MAYREAD | \
+				 VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_FLAGS_EXEC	(VM_READ | VM_WRITE | VM_EXEC | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#ifndef VM_DATA_DEFAULT_FLAGS		/* arch can override this */
+#define VM_DATA_DEFAULT_FLAGS  VM_DATA_FLAGS_EXEC
+#endif
+
 #ifndef VM_STACK_DEFAULT_FLAGS		/* arch can override this */
 #define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS
 #endif