3.16.59-rc1 review patch. If anyone has any objections, please let me know.
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From: "Kirill A. Shutemov" kirill.shutemov@linux.intel.com
commit 780fc5642f59b6c6e2b05794de60b2d2ad5f040e upstream.
We've replaced remap_file_pages(2) implementation with emulation. Nobody creates non-linear mapping anymore.
Signed-off-by: Kirill A. Shutemov kirill.shutemov@linux.intel.com Cc: Benjamin Herrenschmidt benh@kernel.crashing.org Cc: Paul Mackerras paulus@samba.org Cc: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- arch/powerpc/include/asm/pgtable-ppc32.h | 9 ++------- arch/powerpc/include/asm/pgtable-ppc64.h | 5 +---- arch/powerpc/include/asm/pgtable.h | 1 - arch/powerpc/include/asm/pte-40x.h | 1 - arch/powerpc/include/asm/pte-44x.h | 5 ----- arch/powerpc/include/asm/pte-8xx.h | 1 - arch/powerpc/include/asm/pte-book3e.h | 1 - arch/powerpc/include/asm/pte-fsl-booke.h | 3 --- arch/powerpc/include/asm/pte-hash32.h | 1 - arch/powerpc/include/asm/pte-hash64.h | 1 - arch/powerpc/mm/pgtable_64.c | 2 +- 11 files changed, 4 insertions(+), 26 deletions(-)
--- a/arch/powerpc/include/asm/pgtable-ppc32.h +++ b/arch/powerpc/include/asm/pgtable-ppc32.h @@ -314,8 +314,8 @@ static inline void __ptep_set_access_fla /* * Encode and decode a swap entry. * Note that the bits we use in a PTE for representing a swap entry - * must not include the _PAGE_PRESENT bit, the _PAGE_FILE bit, or the - *_PAGE_HASHPTE bit (if used). -- paulus + * must not include the _PAGE_PRESENT bit or the _PAGE_HASHPTE bit (if used). + * -- paulus */ #define __swp_type(entry) ((entry).val & 0x1f) #define __swp_offset(entry) ((entry).val >> 5) @@ -323,11 +323,6 @@ static inline void __ptep_set_access_fla #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 3 }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val << 3 })
-/* Encode and decode a nonlinear file mapping entry */ -#define PTE_FILE_MAX_BITS 29 -#define pte_to_pgoff(pte) (pte_val(pte) >> 3) -#define pgoff_to_pte(off) ((pte_t) { ((off) << 3) | _PAGE_FILE }) - /* * No page table caches to initialise */ --- a/arch/powerpc/include/asm/pgtable-ppc64.h +++ b/arch/powerpc/include/asm/pgtable-ppc64.h @@ -352,9 +352,6 @@ static inline void __ptep_set_access_fla #define __swp_entry(type, offset) ((swp_entry_t){((type)<< 1)|((offset)<<8)}) #define __pte_to_swp_entry(pte) ((swp_entry_t){pte_val(pte) >> PTE_RPN_SHIFT}) #define __swp_entry_to_pte(x) ((pte_t) { (x).val << PTE_RPN_SHIFT }) -#define pte_to_pgoff(pte) (pte_val(pte) >> PTE_RPN_SHIFT) -#define pgoff_to_pte(off) ((pte_t) {((off) << PTE_RPN_SHIFT)|_PAGE_FILE}) -#define PTE_FILE_MAX_BITS (BITS_PER_LONG - PTE_RPN_SHIFT)
void pgtable_cache_add(unsigned shift, void (*ctor)(void *)); void pgtable_cache_init(void); @@ -389,7 +386,7 @@ void pgtable_cache_init(void); * The last three bits are intentionally left to zero. This memory location * are also used as normal page PTE pointers. So if we have any pointers * left around while we collapse a hugepage, we need to make sure - * _PAGE_PRESENT and _PAGE_FILE bits of that are zero when we look at them + * _PAGE_PRESENT bit of that is zero when we look at them */ static inline unsigned int hpte_valid(unsigned char *hpte_slot_array, int index) { --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -32,7 +32,6 @@ struct mm_struct; static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } -static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; } static inline int pte_none(pte_t pte) { return (pte_val(pte) & ~_PTE_NONE_MASK) == 0; } static inline pgprot_t pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte) & PAGE_PROT_BITS); } --- a/arch/powerpc/include/asm/pte-40x.h +++ b/arch/powerpc/include/asm/pte-40x.h @@ -38,7 +38,6 @@ */
#define _PAGE_GUARDED 0x001 /* G: page is guarded from prefetch */ -#define _PAGE_FILE 0x001 /* when !present: nonlinear file mapping */ #define _PAGE_PRESENT 0x002 /* software: PTE contains a translation */ #define _PAGE_NO_CACHE 0x004 /* I: caching is inhibited */ #define _PAGE_WRITETHRU 0x008 /* W: caching is write-through */ --- a/arch/powerpc/include/asm/pte-44x.h +++ b/arch/powerpc/include/asm/pte-44x.h @@ -44,9 +44,6 @@ * - PRESENT *must* be in the bottom three bits because swap cache * entries use the top 29 bits for TLB2. * - * - FILE *must* be in the bottom three bits because swap cache - * entries use the top 29 bits for TLB2. - * * - CACHE COHERENT bit (M) has no effect on original PPC440 cores, * because it doesn't support SMP. However, some later 460 variants * have -some- form of SMP support and so I keep the bit there for @@ -68,7 +65,6 @@ * * There are three protection bits available for SWAP entry: * _PAGE_PRESENT - * _PAGE_FILE * _PAGE_HASHPTE (if HW has) * * So those three bits have to be inside of 0-2nd LSB of PTE. @@ -77,7 +73,6 @@
#define _PAGE_PRESENT 0x00000001 /* S: PTE valid */ #define _PAGE_RW 0x00000002 /* S: Write permission */ -#define _PAGE_FILE 0x00000004 /* S: nonlinear file mapping */ #define _PAGE_EXEC 0x00000004 /* H: Execute permission */ #define _PAGE_ACCESSED 0x00000008 /* S: Page referenced */ #define _PAGE_DIRTY 0x00000010 /* S: Page dirty */ --- a/arch/powerpc/include/asm/pte-8xx.h +++ b/arch/powerpc/include/asm/pte-8xx.h @@ -29,7 +29,6 @@
/* Definitions for 8xx embedded chips. */ #define _PAGE_PRESENT 0x0001 /* Page is valid */ -#define _PAGE_FILE 0x0002 /* when !present: nonlinear file mapping */ #define _PAGE_NO_CACHE 0x0002 /* I: cache inhibit */ #define _PAGE_SHARED 0x0004 /* No ASID (context) compare */ #define _PAGE_SPECIAL 0x0008 /* SW entry, forced to 0 by the TLB miss */ --- a/arch/powerpc/include/asm/pte-book3e.h +++ b/arch/powerpc/include/asm/pte-book3e.h @@ -10,7 +10,6 @@
/* Architected bits */ #define _PAGE_PRESENT 0x000001 /* software: pte contains a translation */ -#define _PAGE_FILE 0x000002 /* (!present only) software: pte holds file offset */ #define _PAGE_SW1 0x000002 #define _PAGE_BAP_SR 0x000004 #define _PAGE_BAP_UR 0x000008 --- a/arch/powerpc/include/asm/pte-fsl-booke.h +++ b/arch/powerpc/include/asm/pte-fsl-booke.h @@ -13,14 +13,11 @@ - PRESENT *must* be in the bottom three bits because swap cache entries use the top 29 bits.
- - FILE *must* be in the bottom three bits because swap cache - entries use the top 29 bits. */
/* Definitions for FSL Book-E Cores */ #define _PAGE_PRESENT 0x00001 /* S: PTE contains a translation */ #define _PAGE_USER 0x00002 /* S: User page (maps to UR) */ -#define _PAGE_FILE 0x00002 /* S: when !present: nonlinear file mapping */ #define _PAGE_RW 0x00004 /* S: Write permission (SW) */ #define _PAGE_DIRTY 0x00008 /* S: Page dirty */ #define _PAGE_EXEC 0x00010 /* H: SX permission */ --- a/arch/powerpc/include/asm/pte-hash32.h +++ b/arch/powerpc/include/asm/pte-hash32.h @@ -18,7 +18,6 @@
#define _PAGE_PRESENT 0x001 /* software: pte contains a translation */ #define _PAGE_HASHPTE 0x002 /* hash_page has made an HPTE for this pte */ -#define _PAGE_FILE 0x004 /* when !present: nonlinear file mapping */ #define _PAGE_USER 0x004 /* usermode access allowed */ #define _PAGE_GUARDED 0x008 /* G: prohibit speculative access */ #define _PAGE_COHERENT 0x010 /* M: enforce memory coherence (SMP systems) */ --- a/arch/powerpc/include/asm/pte-hash64.h +++ b/arch/powerpc/include/asm/pte-hash64.h @@ -16,7 +16,6 @@ */ #define _PAGE_PRESENT 0x0001 /* software: pte contains a translation */ #define _PAGE_USER 0x0002 /* matches one of the PP bits */ -#define _PAGE_FILE 0x0002 /* (!present only) software: pte holds file offset */ #define _PAGE_EXEC 0x0004 /* No execute on POWER4 and newer (we invert) */ #define _PAGE_GUARDED 0x0008 /* We can derive Memory coherence from _PAGE_NO_CACHE */ --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -807,7 +807,7 @@ pmd_t pfn_pmd(unsigned long pfn, pgprot_ { pmd_t pmd; /* - * For a valid pte, we would have _PAGE_PRESENT or _PAGE_FILE always + * For a valid pte, we would have _PAGE_PRESENT always * set. We use this to check THP page at pmd level. * leaf pte for huge page, bottom two bits != 00 */