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remap_file_pages: kernel-doc corrections

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Fix kernel-doc for sys_remap_file_pages() and add info to the 'prot' NOTE.
Rename __prot parameter to prot.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Randy Dunlap
2007-10-16 23:31:29 -07:00
committed by Linus Torvalds
parent f32143a2fe
commit 8d63494f78
1 changed files with 13 additions and 11 deletions
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24
mm/fremap.c
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@@ -97,26 +97,28 @@ static int populate_range(struct mm_struct *mm, struct vm_area_struct *vma,
} }
/*** /**
* sys_remap_file_pages - remap arbitrary pages of a shared backing store * sys_remap_file_pages - remap arbitrary pages of an existing VM_SHARED vma
* file within an existing vma.
* @start: start of the remapped virtual memory range * @start: start of the remapped virtual memory range
* @size: size of the remapped virtual memory range * @size: size of the remapped virtual memory range
* @prot: new protection bits of the range * @prot: new protection bits of the range (see NOTE)
* @pgoff: to be mapped page of the backing store file * @pgoff: to-be-mapped page of the backing store file
* @flags: 0 or MAP_NONBLOCKED - the later will cause no IO. * @flags: 0 or MAP_NONBLOCKED - the later will cause no IO.
* *
* this syscall works purely via pagetables, so it's the most efficient * sys_remap_file_pages remaps arbitrary pages of an existing VM_SHARED vma
* (shared backing store file).
*
* This syscall works purely via pagetables, so it's the most efficient
* way to map the same (large) file into a given virtual window. Unlike * way to map the same (large) file into a given virtual window. Unlike
* mmap()/mremap() it does not create any new vmas. The new mappings are * mmap()/mremap() it does not create any new vmas. The new mappings are
* also safe across swapout. * also safe across swapout.
* *
* NOTE: the 'prot' parameter right now is ignored, and the vma's default * NOTE: the 'prot' parameter right now is ignored (but must be zero),
* protection is used. Arbitrary protections might be implemented in the * and the vma's default protection is used. Arbitrary protections
* future. * might be implemented in the future.
*/ */
asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size, asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size,
unsigned long __prot, unsigned long pgoff, unsigned long flags) unsigned long prot, unsigned long pgoff, unsigned long flags)
{ {
struct mm_struct *mm = current->mm; struct mm_struct *mm = current->mm;
struct address_space *mapping; struct address_space *mapping;
@@ -125,7 +127,7 @@ asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size,
int err = -EINVAL; int err = -EINVAL;
int has_write_lock = 0; int has_write_lock = 0;
if (__prot) if (prot)
return err; return err;
/* /*
* Sanitize the syscall parameters: * Sanitize the syscall parameters: