diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2001-04-05 04:55:58 +0000 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2001-04-05 04:55:58 +0000 |
commit | 74a9f2e1b4d3ab45a9f72cb5b556c9f521524ab3 (patch) | |
tree | 7c4cdb103ab1b388c9852a88bd6fb1e73eba0b5c /include/linux/mm.h | |
parent | ee6374c8b0d333c08061c6a97bc77090d7461225 (diff) |
Merge with Linux 2.4.3.
Note that mingetty does no longer work with serial console, you have to
switch to another getty like getty_ps. This commit also includes a
fix for a setitimer bug which did prevent getty_ps from working on
older kernels.
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r-- | include/linux/mm.h | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index f6c7cc6e2..86bc813ad 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -395,12 +395,26 @@ extern int remap_page_range(unsigned long from, unsigned long to, unsigned long extern int zeromap_page_range(unsigned long from, unsigned long size, pgprot_t prot); extern void vmtruncate(struct inode * inode, loff_t offset); +extern pmd_t *FASTCALL(__pmd_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address)); +extern pte_t *FASTCALL(pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address)); extern int handle_mm_fault(struct mm_struct *mm,struct vm_area_struct *vma, unsigned long address, int write_access); extern int make_pages_present(unsigned long addr, unsigned long end); extern int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, int write); extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char *dst, int len); extern int ptrace_writedata(struct task_struct *tsk, char * src, unsigned long dst, int len); +/* + * On a two-level page table, this ends up being trivial. Thus the + * inlining and the symmetry break with pte_alloc() that does all + * of this out-of-line. + */ +static inline pmd_t *pmd_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address) +{ + if (!pgd_present(*pgd)) + return __pmd_alloc(mm, pgd, address); + return pmd_offset(pgd, address); +} + extern int pgt_cache_water[2]; extern int check_pgt_cache(void); @@ -481,11 +495,6 @@ extern struct page *filemap_nopage(struct vm_area_struct *, unsigned long, int); #define GFP_DMA __GFP_DMA -/* Flag - indicates that the buffer can be taken from high memory which is not - permanently mapped by the kernel */ - -#define GFP_HIGHMEM __GFP_HIGHMEM - /* vma is the first one with address < vma->vm_end, * and even address < vma->vm_start. Have to extend vma. */ static inline int expand_stack(struct vm_area_struct * vma, unsigned long address) @@ -497,11 +506,13 @@ static inline int expand_stack(struct vm_area_struct * vma, unsigned long addres if (vma->vm_end - address > current->rlim[RLIMIT_STACK].rlim_cur || ((vma->vm_mm->total_vm + grow) << PAGE_SHIFT) > current->rlim[RLIMIT_AS].rlim_cur) return -ENOMEM; + spin_lock(&vma->vm_mm->page_table_lock); vma->vm_start = address; vma->vm_pgoff -= grow; vma->vm_mm->total_vm += grow; if (vma->vm_flags & VM_LOCKED) vma->vm_mm->locked_vm += grow; + spin_unlock(&vma->vm_mm->page_table_lock); return 0; } |