diff options
Diffstat (limited to 'mm/fadvise.c')
-rw-r--r-- | mm/fadvise.c | 15 |
1 files changed, 2 insertions, 13 deletions
diff --git a/mm/fadvise.c b/mm/fadvise.c index 0a03357a1f8e..168c78a121bb 100644 --- a/mm/fadvise.c +++ b/mm/fadvise.c | |||
@@ -23,18 +23,6 @@ | |||
23 | /* | 23 | /* |
24 | * POSIX_FADV_WILLNEED could set PG_Referenced, and POSIX_FADV_NOREUSE could | 24 | * POSIX_FADV_WILLNEED could set PG_Referenced, and POSIX_FADV_NOREUSE could |
25 | * deactivate the pages and clear PG_Referenced. | 25 | * deactivate the pages and clear PG_Referenced. |
26 | * | ||
27 | * LINUX_FADV_ASYNC_WRITE: start async writeout of any dirty pages between file | ||
28 | * offsets `offset' and `offset+len' inclusive. Any pages which are currently | ||
29 | * under writeout are skipped, whether or not they are dirty. | ||
30 | * | ||
31 | * LINUX_FADV_WRITE_WAIT: wait upon writeout of any dirty pages between file | ||
32 | * offsets `offset' and `offset+len'. | ||
33 | * | ||
34 | * By combining these two operations the application may do several things: | ||
35 | * | ||
36 | * LINUX_FADV_ASYNC_WRITE: push some or all of the dirty pages at the disk. | ||
37 | * | ||
38 | */ | 26 | */ |
39 | asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice) | 27 | asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice) |
40 | { | 28 | { |
@@ -85,7 +73,6 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice) | |||
85 | file->f_ra.ra_pages = bdi->ra_pages * 2; | 73 | file->f_ra.ra_pages = bdi->ra_pages * 2; |
86 | break; | 74 | break; |
87 | case POSIX_FADV_WILLNEED: | 75 | case POSIX_FADV_WILLNEED: |
88 | case POSIX_FADV_NOREUSE: | ||
89 | if (!mapping->a_ops->readpage) { | 76 | if (!mapping->a_ops->readpage) { |
90 | ret = -EINVAL; | 77 | ret = -EINVAL; |
91 | break; | 78 | break; |
@@ -106,6 +93,8 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice) | |||
106 | if (ret > 0) | 93 | if (ret > 0) |
107 | ret = 0; | 94 | ret = 0; |
108 | break; | 95 | break; |
96 | case POSIX_FADV_NOREUSE: | ||
97 | break; | ||
109 | case POSIX_FADV_DONTNEED: | 98 | case POSIX_FADV_DONTNEED: |
110 | if (!bdi_write_congested(mapping->backing_dev_info)) | 99 | if (!bdi_write_congested(mapping->backing_dev_info)) |
111 | filemap_flush(mapping); | 100 | filemap_flush(mapping); |