提交 08964c56 编写于 作者: J Jeff Dike 提交者: Linus Torvalds

[PATCH] uml: merge duplicated page table code

There is a lot of code which is duplicated between the 2 and 3 level
implementation, with the only difference that the 3-level implementation is a
bit more generalized (instead of accessing directly pte_t.pte, it uses the
appropriate access macros).

So this code is joined together.

As obvious, a "core code nice cleanup" is not a "stability-friendly patch" so
usual care applies.
Signed-off-by: NPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 c5600490
...@@ -35,35 +35,8 @@ ...@@ -35,35 +35,8 @@
static inline int pgd_newpage(pgd_t pgd) { return 0; } static inline int pgd_newpage(pgd_t pgd) { return 0; }
static inline void pgd_mkuptodate(pgd_t pgd) { } static inline void pgd_mkuptodate(pgd_t pgd) { }
#define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
static inline pte_t pte_mknewprot(pte_t pte)
{
pte_val(pte) |= _PAGE_NEWPROT;
return(pte);
}
static inline pte_t pte_mknewpage(pte_t pte)
{
pte_val(pte) |= _PAGE_NEWPAGE;
return(pte);
}
static inline void set_pte(pte_t *pteptr, pte_t pteval)
{
/* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so
* fix_range knows to unmap it. _PAGE_NEWPROT is specific to
* mapped pages.
*/
*pteptr = pte_mknewpage(pteval);
if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr);
}
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pte_none(x) !(pte_val(x) & ~_PAGE_NEWPAGE)
#define pte_pfn(x) phys_to_pfn(pte_val(x)) #define pte_pfn(x) phys_to_pfn(pte_val(x))
#define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot)) #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)) #define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))
......
...@@ -57,35 +57,6 @@ static inline int pgd_newpage(pgd_t pgd) ...@@ -57,35 +57,6 @@ static inline int pgd_newpage(pgd_t pgd)
static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; } static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; }
#define pte_present(x) pte_get_bits(x, (_PAGE_PRESENT | _PAGE_PROTNONE))
static inline pte_t pte_mknewprot(pte_t pte)
{
pte_set_bits(pte, _PAGE_NEWPROT);
return(pte);
}
static inline pte_t pte_mknewpage(pte_t pte)
{
pte_set_bits(pte, _PAGE_NEWPAGE);
return(pte);
}
static inline void set_pte(pte_t *pteptr, pte_t pteval)
{
pte_copy(*pteptr, pteval);
/* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so
* fix_range knows to unmap it. _PAGE_NEWPROT is specific to
* mapped pages.
*/
*pteptr = pte_mknewpage(*pteptr);
if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr);
}
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
#define set_pmd(pmdptr, pmdval) set_64bit((phys_t *) (pmdptr), pmd_val(pmdval)) #define set_pmd(pmdptr, pmdval) set_64bit((phys_t *) (pmdptr), pmd_val(pmdval))
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
...@@ -113,13 +84,6 @@ static inline void pud_clear (pud_t * pud) { } ...@@ -113,13 +84,6 @@ static inline void pud_clear (pud_t * pud) { }
#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \ #define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
pmd_index(address)) pmd_index(address))
#define pte_page(x) pfn_to_page(pte_pfn(x))
static inline int pte_none(pte_t pte)
{
return pte_is_zero(pte);
}
static inline unsigned long pte_pfn(pte_t pte) static inline unsigned long pte_pfn(pte_t pte)
{ {
return phys_to_pfn(pte_val(pte)); return phys_to_pfn(pte_val(pte));
......
...@@ -153,10 +153,24 @@ extern unsigned long pg0[1024]; ...@@ -153,10 +153,24 @@ extern unsigned long pg0[1024];
#define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK) #define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK)
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pte_address(x) (__va(pte_val(x) & PAGE_MASK)) #define pte_address(x) (__va(pte_val(x) & PAGE_MASK))
#define mk_phys(a, r) ((a) + (((unsigned long) r) << REGION_SHIFT)) #define mk_phys(a, r) ((a) + (((unsigned long) r) << REGION_SHIFT))
#define phys_addr(p) ((p) & ~REGION_MASK) #define phys_addr(p) ((p) & ~REGION_MASK)
#define pte_present(x) pte_get_bits(x, (_PAGE_PRESENT | _PAGE_PROTNONE))
/*
* =================================
* Flags checking section.
* =================================
*/
static inline int pte_none(pte_t pte)
{
return pte_is_zero(pte);
}
/* /*
* The following only work if pte_present() is true. * The following only work if pte_present() is true.
* Undefined behaviour if not.. * Undefined behaviour if not..
...@@ -212,6 +226,18 @@ static inline int pte_newprot(pte_t pte) ...@@ -212,6 +226,18 @@ static inline int pte_newprot(pte_t pte)
return(pte_present(pte) && (pte_get_bits(pte, _PAGE_NEWPROT))); return(pte_present(pte) && (pte_get_bits(pte, _PAGE_NEWPROT)));
} }
/*
* =================================
* Flags setting section.
* =================================
*/
static inline pte_t pte_mknewprot(pte_t pte)
{
pte_set_bits(pte, _PAGE_NEWPROT);
return(pte);
}
static inline pte_t pte_rdprotect(pte_t pte) static inline pte_t pte_rdprotect(pte_t pte)
{ {
pte_clear_bits(pte, _PAGE_USER); pte_clear_bits(pte, _PAGE_USER);
...@@ -280,6 +306,26 @@ static inline pte_t pte_mkuptodate(pte_t pte) ...@@ -280,6 +306,26 @@ static inline pte_t pte_mkuptodate(pte_t pte)
return(pte); return(pte);
} }
static inline pte_t pte_mknewpage(pte_t pte)
{
pte_set_bits(pte, _PAGE_NEWPAGE);
return(pte);
}
static inline void set_pte(pte_t *pteptr, pte_t pteval)
{
pte_copy(*pteptr, pteval);
/* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so
* fix_range knows to unmap it. _PAGE_NEWPROT is specific to
* mapped pages.
*/
*pteptr = pte_mknewpage(*pteptr);
if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr);
}
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
extern phys_t page_to_phys(struct page *page); extern phys_t page_to_phys(struct page *page);
/* /*
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册