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Commit 084c3049 authored by Marco Stornelli's avatar Marco Stornelli Committed by Linus Torvalds
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DOC: update xip method info 



xip documentation updated:
- change "get_xip_page" to "get_xip_mem";
- explain changed function parameters

Signed-off-by: default avatarMarco Stornelli <marco.stornelli@gmail.com>
Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
Cc: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b67ad18b

Documentation/filesystems/xip.txt

+5 −4
Original line number Original line Diff line number Diff line
@@ -39,10 +39,11 @@ The block device operation is optional, these block devices support it as of 
today:

today:

- dcssblk: s390 dcss block device driver

- dcssblk: s390 dcss block device driver





An address space operation named get_xip_page is used to retrieve reference

An address space operation named get_xip_mem is used to retrieve references

to a struct page. To address the target page, a reference to an address_space,

to a page frame number and a kernel address. To obtain these values a reference

and a sector number is provided. A 3rd argument indicates whether the

to an address_space is provided. This function assigns values to the kmem and

function should allocate blocks if needed.

pfn parameters. The third argument indicates whether the function should allocate

blocks if needed.





This address space operation is mutually exclusive with readpage&writepage that

This address space operation is mutually exclusive with readpage&writepage that

do page cache read/write operations.

do page cache read/write operations.