[PATCH 3.16 086/131] um: drop _PAGE_FILE and pte_file()-related helpers

From: Ben Hutchings
Date: Sat Sep 29 2018 - 17:54:57 EST


3.16.59-rc1 review patch. If anyone has any objections, please let me know.

------------------

From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>

commit 3513006a5691ae3629eef9ddef0b71a47c40dfbc 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@xxxxxxxxxxxxxxx>
Cc: Jeff Dike <jdike@xxxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
arch/um/include/asm/pgtable-2level.h | 9 ---------
arch/um/include/asm/pgtable-3level.h | 20 --------------------
arch/um/include/asm/pgtable.h | 9 ---------
3 files changed, 38 deletions(-)

--- a/arch/um/include/asm/pgtable-2level.h
+++ b/arch/um/include/asm/pgtable-2level.h
@@ -41,13 +41,4 @@ static inline void pgd_mkuptodate(pgd_t
#define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot))
#define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))

-/*
- * Bits 0 through 4 are taken
- */
-#define PTE_FILE_MAX_BITS 27
-
-#define pte_to_pgoff(pte) (pte_val(pte) >> 5)
-
-#define pgoff_to_pte(off) ((pte_t) { ((off) << 5) + _PAGE_FILE })
-
#endif
--- a/arch/um/include/asm/pgtable-3level.h
+++ b/arch/um/include/asm/pgtable-3level.h
@@ -112,25 +112,5 @@ static inline pmd_t pfn_pmd(pfn_t page_n
return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
}

-/*
- * Bits 0 through 3 are taken in the low part of the pte,
- * put the 32 bits of offset into the high part.
- */
-#define PTE_FILE_MAX_BITS 32
-
-#ifdef CONFIG_64BIT
-
-#define pte_to_pgoff(p) ((p).pte >> 32)
-
-#define pgoff_to_pte(off) ((pte_t) { ((off) << 32) | _PAGE_FILE })
-
-#else
-
-#define pte_to_pgoff(pte) ((pte).pte_high)
-
-#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
-
-#endif
-
#endif

--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -18,7 +18,6 @@
#define _PAGE_ACCESSED 0x080
#define _PAGE_DIRTY 0x100
/* If _PAGE_PRESENT is clear, we use these: */
-#define _PAGE_FILE 0x008 /* nonlinear file mapping, saved PTE; unset:swap */
#define _PAGE_PROTNONE 0x010 /* if the user mapped it with PROT_NONE;
pte_present gives true */

@@ -151,14 +150,6 @@ static inline int pte_write(pte_t pte)
!(pte_get_bits(pte, _PAGE_PROTNONE)));
}

-/*
- * The following only works if pte_present() is not true.
- */
-static inline int pte_file(pte_t pte)
-{
- return pte_get_bits(pte, _PAGE_FILE);
-}
-
static inline int pte_dirty(pte_t pte)
{
return pte_get_bits(pte, _PAGE_DIRTY);