mm, arch: add generic implementation of pfn_valid() for FLATMEM

Every architecture that supports FLATMEM memory model defines its own version of pfn_valid() that essentially compares a pfn to max_mapnr. Use mips/powerpc version implemented as static inline as a generic implementation of pfn_valid() and drop its per-architecture definitions. [[email protected]: fix the generic pfn_valid()] Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Rapoport (IBM) <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Acked-by: Guo Ren <[email protected]> [csky] Acked-by: Huacai Chen <[email protected]> [LoongArch] Acked-by: Stafford Horne <[email protected]> [OpenRISC] Acked-by: Michael Ellerman <[email protected]> [powerpc] Reviewed-by: David Hildenbrand <[email protected]> Tested-by: Conor Dooley <[email protected]> Cc: Brian Cain <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Dinh Nguyen <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Greg Ungerer <[email protected]> Cc: Helge Deller <[email protected]> Cc: Huacai Chen <[email protected]> Cc: Matt Turner <[email protected]> Cc: Max Filippov <[email protected]> Cc: Michal Simek <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Rich Felker <[email protected]> Cc: Russell King <[email protected]> Cc: Thomas Bogendoerfer <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: WANG Xuerui <[email protected]> Cc: Yoshinori Sato <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
niw · Feb 10, 2023 · e5080a9 · e5080a9
1 parent c2524a6
commit e5080a9
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Showing 22 changed files with 14 additions and 86 deletions.
diff --git a/arch/alpha/include/asm/page.h b/arch/alpha/include/asm/page.h
@@ -86,10 +86,6 @@ typedef struct page *pgtable_t;
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 #define virt_addr_valid(kaddr)	pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
 
-#ifdef CONFIG_FLATMEM
-#define pfn_valid(pfn)		((pfn) < max_mapnr)
-#endif /* CONFIG_FLATMEM */
-
 #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
@@ -109,7 +109,6 @@ extern int pfn_valid(unsigned long pfn);
 #else /* CONFIG_HIGHMEM */
 
 #define ARCH_PFN_OFFSET		virt_to_pfn(CONFIG_LINUX_RAM_BASE)
-#define pfn_valid(pfn)		(((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
 
 #endif /* CONFIG_HIGHMEM */
 

diff --git a/arch/csky/include/asm/page.h b/arch/csky/include/asm/page.h
@@ -39,7 +39,6 @@
 
 #define virt_addr_valid(kaddr)  ((void *)(kaddr) >= (void *)PAGE_OFFSET && \
 			(void *)(kaddr) < high_memory)
-#define pfn_valid(pfn)		((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
 
 extern void *memset(void *dest, int c, size_t l);
 extern void *memcpy(void *to, const void *from, size_t l);

diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/page.h
@@ -95,7 +95,6 @@ struct page;
 /* Default vm area behavior is non-executable.  */
 #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)
 
 /*  Need to not use a define for linesize; may move this to another file.  */

diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
@@ -95,10 +95,6 @@ do {						\
 
 #include <asm-generic/memory_model.h>
 
-#ifdef CONFIG_FLATMEM
-# define pfn_valid(pfn)		((pfn) < max_mapnr)
-#endif
-
 #define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)

diff --git a/arch/loongarch/include/asm/page.h b/arch/loongarch/include/asm/page.h
@@ -82,19 +82,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
 
 #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
 
-#ifdef CONFIG_FLATMEM
-
-static inline int pfn_valid(unsigned long pfn)
-{
-	/* avoid <linux/mm.h> include hell */
-	extern unsigned long max_mapnr;
-	unsigned long pfn_offset = ARCH_PFN_OFFSET;
-
-	return pfn >= pfn_offset && pfn < max_mapnr;
-}
-
-#endif
-
 #define virt_to_pfn(kaddr)	PFN_DOWN(PHYSADDR(kaddr))
 #define virt_to_page(kaddr)	pfn_to_page(virt_to_pfn(kaddr))
 

diff --git a/arch/m68k/include/asm/page_no.h b/arch/m68k/include/asm/page_no.h
@@ -25,8 +25,6 @@ extern unsigned long memory_end;
 #define virt_to_page(addr)	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
 #define page_to_virt(page)	__va(((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET))
 
-#define pfn_valid(pfn)	        ((pfn) < max_mapnr)
-
 #define	virt_addr_valid(kaddr)	(((unsigned long)(kaddr) >= PAGE_OFFSET) && \
 				((unsigned long)(kaddr) < memory_end))
 

diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
@@ -112,7 +112,6 @@ extern int page_is_ram(unsigned long pfn);
 #  define page_to_phys(page)     (page_to_pfn(page) << PAGE_SHIFT)
 
 #  define ARCH_PFN_OFFSET	(memory_start >> PAGE_SHIFT)
-#  define pfn_valid(pfn)	((pfn) >= ARCH_PFN_OFFSET && (pfn) < (max_mapnr + ARCH_PFN_OFFSET))
 # endif /* __ASSEMBLY__ */
 
 #define	virt_addr_valid(vaddr)	(pfn_valid(virt_to_pfn(vaddr)))

diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h
@@ -224,19 +224,6 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
 
 #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
 
-#ifdef CONFIG_FLATMEM
-
-static inline int pfn_valid(unsigned long pfn)
-{
-	/* avoid <linux/mm.h> include hell */
-	extern unsigned long max_mapnr;
-	unsigned long pfn_offset = ARCH_PFN_OFFSET;
-
-	return pfn >= pfn_offset && pfn < max_mapnr;
-}
-
-#endif
-
 #define virt_to_pfn(kaddr)   	PFN_DOWN(virt_to_phys((void *)(kaddr)))
 #define virt_to_page(kaddr)	pfn_to_page(virt_to_pfn(kaddr))
 

diff --git a/arch/nios2/include/asm/page.h b/arch/nios2/include/asm/page.h
@@ -86,15 +86,6 @@ extern struct page *mem_map;
 
 # define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
 
-static inline bool pfn_valid(unsigned long pfn)
-{
-	/* avoid <linux/mm.h> include hell */
-	extern unsigned long max_mapnr;
-	unsigned long pfn_offset = ARCH_PFN_OFFSET;
-
-	return pfn >= pfn_offset && pfn < max_mapnr;
-}
-
 # 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)))
 

diff --git a/arch/openrisc/include/asm/page.h b/arch/openrisc/include/asm/page.h
@@ -80,8 +80,6 @@ typedef struct page *pgtable_t;
 
 #define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
 
-#define pfn_valid(pfn)          ((pfn) < max_mapnr)
-
 #define virt_addr_valid(kaddr)	(pfn_valid(virt_to_pfn(kaddr)))
 
 #endif /* __ASSEMBLY__ */

diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
@@ -155,10 +155,6 @@ extern int npmem_ranges;
 #define __pa(x)			((unsigned long)(x)-PAGE_OFFSET)
 #define __va(x)			((void *)((unsigned long)(x)+PAGE_OFFSET))
 
-#ifndef CONFIG_SPARSEMEM
-#define pfn_valid(pfn)		((pfn) < max_mapnr)
-#endif
-
 #ifdef CONFIG_HUGETLB_PAGE
 #define HPAGE_SHIFT		PMD_SHIFT /* fixed for transparent huge pages */
 #define HPAGE_SIZE      	((1UL) << HPAGE_SHIFT)

diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
@@ -117,15 +117,6 @@ extern long long virt_phys_offset;
 
 #ifdef CONFIG_FLATMEM
 #define ARCH_PFN_OFFSET		((unsigned long)(MEMORY_START >> PAGE_SHIFT))
-#ifndef __ASSEMBLY__
-extern unsigned long max_mapnr;
-static inline bool pfn_valid(unsigned long pfn)
-{
-	unsigned long min_pfn = ARCH_PFN_OFFSET;
-
-	return pfn >= min_pfn && pfn < max_mapnr;
-}
-#endif
 #endif
 
 #define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)

diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
@@ -171,11 +171,6 @@ extern phys_addr_t __phys_addr_symbol(unsigned long x);
 
 #define sym_to_pfn(x)           __phys_to_pfn(__pa_symbol(x))
 
-#ifdef CONFIG_FLATMEM
-#define pfn_valid(pfn) \
-	(((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
-#endif
-
 #endif /* __ASSEMBLY__ */
 
 #define virt_addr_valid(vaddr)	({						\

diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
@@ -169,9 +169,6 @@ typedef struct page *pgtable_t;
 #define PFN_START		(__MEMORY_START >> PAGE_SHIFT)
 #define ARCH_PFN_OFFSET		(PFN_START)
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-#ifdef CONFIG_FLATMEM
-#define pfn_valid(pfn)		((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
-#endif
 #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 
 #include <asm-generic/memory_model.h>

diff --git a/arch/sparc/include/asm/page_32.h b/arch/sparc/include/asm/page_32.h
@@ -130,7 +130,6 @@ extern unsigned long pfn_base;
 #define ARCH_PFN_OFFSET		(pfn_base)
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 
-#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)
 
 #include <asm-generic/memory_model.h>

diff --git a/arch/um/include/asm/page.h b/arch/um/include/asm/page.h
@@ -108,7 +108,6 @@ extern unsigned long uml_physmem;
 #define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
 #define pfn_to_phys(pfn) PFN_PHYS(pfn)
 
-#define pfn_valid(pfn) ((pfn) < max_mapnr)
 #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
 
 #include <asm-generic/memory_model.h>

diff --git a/arch/x86/include/asm/page_32.h b/arch/x86/include/asm/page_32.h
@@ -15,10 +15,6 @@ extern unsigned long __phys_addr(unsigned long);
 #define __phys_addr_symbol(x)	__phys_addr(x)
 #define __phys_reloc_hide(x)	RELOC_HIDE((x), 0)
 
-#ifdef CONFIG_FLATMEM
-#define pfn_valid(pfn)		((pfn) < max_mapnr)
-#endif /* CONFIG_FLATMEM */
-
 #include <linux/string.h>
 
 static inline void clear_page(void *page)

diff --git a/arch/x86/include/asm/page_64.h b/arch/x86/include/asm/page_64.h
@@ -39,10 +39,6 @@ extern unsigned long __phys_addr_symbol(unsigned long);
 
 #define __phys_reloc_hide(x)	(x)
 
-#ifdef CONFIG_FLATMEM
-#define pfn_valid(pfn)          ((pfn) < max_pfn)
-#endif
-
 void clear_page_orig(void *page);
 void clear_page_rep(void *page);
 void clear_page_erms(void *page);

diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
@@ -11,6 +11,8 @@
 #ifndef _XTENSA_PAGE_H
 #define _XTENSA_PAGE_H
 
+#include <linux/const.h>
+
 #include <asm/processor.h>
 #include <asm/types.h>
 #include <asm/cache.h>
@@ -189,8 +191,6 @@ static inline unsigned long ___pa(unsigned long va)
 #endif
 #define __va(x)	\
 	((void *)((unsigned long) (x) - PHYS_OFFSET + PAGE_OFFSET))
-#define pfn_valid(pfn) \
-	((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
 
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 #define page_to_virt(page)	__va(page_to_pfn(page) << PAGE_SHIFT)

diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h
@@ -19,6 +19,18 @@
 #define __page_to_pfn(page)	((unsigned long)((page) - mem_map) + \
 				 ARCH_PFN_OFFSET)
 
+#ifndef pfn_valid
+static inline int pfn_valid(unsigned long pfn)
+{
+	/* avoid <linux/mm.h> include hell */
+	extern unsigned long max_mapnr;
+	unsigned long pfn_offset = ARCH_PFN_OFFSET;
+
+	return pfn >= pfn_offset && (pfn - pfn_offset) < max_mapnr;
+}
+#define pfn_valid pfn_valid
+#endif
+
 #elif defined(CONFIG_SPARSEMEM_VMEMMAP)
 
 /* memmap is virtually contiguous.  */

diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h
@@ -84,8 +84,6 @@ extern unsigned long memory_end;
 #define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
 #endif
 
-#define pfn_valid(pfn)		((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
-
 #define	virt_addr_valid(kaddr)	(((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
 				((void *)(kaddr) < (void *)memory_end))