diff options
Diffstat (limited to 'Documentation/filesystems/xip.txt')
| -rw-r--r-- | Documentation/filesystems/xip.txt | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/Documentation/filesystems/xip.txt b/Documentation/filesystems/xip.txt index 6c0cef10eb4..0466ee56927 100644 --- a/Documentation/filesystems/xip.txt +++ b/Documentation/filesystems/xip.txt @@ -19,7 +19,7 @@ completely. With execute-in-place, read&write type operations are performed directly from/to the memory backed storage device. For file mappings, the storage device itself is mapped directly into userspace. -This implementation was initialy written for shared memory segments between +This implementation was initially written for shared memory segments between different virtual machines on s390 hardware to allow multiple machines to share the same binaries and libraries. @@ -39,10 +39,11 @@ The block device operation is optional, these block devices support it as of today: - dcssblk: s390 dcss block device driver -An address space operation named get_xip_page is used to retrieve reference -to a struct page. To address the target page, a reference to an address_space, -and a sector number is provided. A 3rd argument indicates whether the -function should allocate blocks if needed. +An address space operation named get_xip_mem is used to retrieve references +to a page frame number and a kernel address. To obtain these values a reference +to an address_space is provided. This function assigns values to the kmem and +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 do page cache read/write operations. |