diff options
| author | Oleg Nesterov <oleg@tv-sign.ru> | 2005-03-13 00:22:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-03-13 00:22:38 -0800 |
| commit | 2c4942f99d8fc003f118b1237bb5bfb8f22ddfeb (patch) | |
| tree | 9d6589abd0a21cf46e3bf1fa3b8cc2616d35ac64 /include/linux/vmalloc.h | |
| parent | 5e0168c9f6137a0b6c1d58443d02d45c0e0ee2ae (diff) | |
[PATCH] vmalloc: use list of pages instead of array in vm_struct
This patch assumes that there is no valid usage of
vmalloced_or_vmaped_page->lru.
In such a case vm_struct->array could be eliminated.
It saves some memory and simplifies code a bit.
In vmap/vunmap case vm_struct->page_list is used only
in map_vm_area(), so it is ok to do:
addr1 = vmap(pages, count);
addr2 = vmap(pages, count);
...
vunmap(addr1);
vunmap(addr2);
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/vmalloc.h')
| -rw-r--r-- | include/linux/vmalloc.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 968227f79508..4f6f6de8702d 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -2,6 +2,7 @@ #define _LINUX_VMALLOC_H #include <linux/spinlock.h> +#include <linux/list.h> #include <asm/page.h> /* pgprot_t */ /* bits in vm_struct->flags */ @@ -14,8 +15,7 @@ struct vm_struct { void *addr; unsigned long size; unsigned long flags; - struct page **pages; - unsigned int nr_pages; + struct list_head page_list; unsigned long phys_addr; struct vm_struct *next; }; @@ -30,6 +30,7 @@ extern void *__vmalloc(unsigned long size, int gfp_mask, pgprot_t prot); extern void *__vmalloc_area(struct vm_struct *area, int gfp_mask, pgprot_t prot); extern void vfree(void *addr); +struct page; extern void *vmap(struct page **pages, unsigned int count, unsigned long flags, pgprot_t prot); extern void vunmap(void *addr); @@ -41,8 +42,7 @@ extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, unsigned long start, unsigned long end); extern struct vm_struct *remove_vm_area(void *addr); -extern int map_vm_area(struct vm_struct *area, pgprot_t prot, - struct page ***pages); +extern int map_vm_area(struct vm_struct *area, pgprot_t prot); extern void unmap_vm_area(struct vm_struct *area); /* |