diff options
Diffstat (limited to 'Documentation/power/userland-swsusp.txt')
-rw-r--r-- | Documentation/power/userland-swsusp.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/power/userland-swsusp.txt b/Documentation/power/userland-swsusp.txt index 81680f9f5909..1101bee4e822 100644 --- a/Documentation/power/userland-swsusp.txt +++ b/Documentation/power/userland-swsusp.txt | |||
@@ -98,7 +98,7 @@ SNAPSHOT_S2RAM - suspend to RAM; using this call causes the kernel to | |||
98 | The device's read() operation can be used to transfer the snapshot image from | 98 | The device's read() operation can be used to transfer the snapshot image from |
99 | the kernel. It has the following limitations: | 99 | the kernel. It has the following limitations: |
100 | - you cannot read() more than one virtual memory page at a time | 100 | - you cannot read() more than one virtual memory page at a time |
101 | - read()s accross page boundaries are impossible (ie. if ypu read() 1/2 of | 101 | - read()s across page boundaries are impossible (ie. if ypu read() 1/2 of |
102 | a page in the previous call, you will only be able to read() | 102 | a page in the previous call, you will only be able to read() |
103 | _at_ _most_ 1/2 of the page in the next call) | 103 | _at_ _most_ 1/2 of the page in the next call) |
104 | 104 | ||
@@ -137,7 +137,7 @@ mechanism and the userland utilities using the interface SHOULD use additional | |||
137 | means, such as checksums, to ensure the integrity of the snapshot image. | 137 | means, such as checksums, to ensure the integrity of the snapshot image. |
138 | 138 | ||
139 | The suspending and resuming utilities MUST lock themselves in memory, | 139 | The suspending and resuming utilities MUST lock themselves in memory, |
140 | preferrably using mlockall(), before calling SNAPSHOT_FREEZE. | 140 | preferably using mlockall(), before calling SNAPSHOT_FREEZE. |
141 | 141 | ||
142 | The suspending utility MUST check the value stored by SNAPSHOT_CREATE_IMAGE | 142 | The suspending utility MUST check the value stored by SNAPSHOT_CREATE_IMAGE |
143 | in the memory location pointed to by the last argument of ioctl() and proceed | 143 | in the memory location pointed to by the last argument of ioctl() and proceed |
@@ -147,7 +147,7 @@ in accordance with it: | |||
147 | (a) The suspending utility MUST NOT close the snapshot device | 147 | (a) The suspending utility MUST NOT close the snapshot device |
148 | _unless_ the whole suspend procedure is to be cancelled, in | 148 | _unless_ the whole suspend procedure is to be cancelled, in |
149 | which case, if the snapshot image has already been saved, the | 149 | which case, if the snapshot image has already been saved, the |
150 | suspending utility SHOULD destroy it, preferrably by zapping | 150 | suspending utility SHOULD destroy it, preferably by zapping |
151 | its header. If the suspend is not to be cancelled, the | 151 | its header. If the suspend is not to be cancelled, the |
152 | system MUST be powered off or rebooted after the snapshot | 152 | system MUST be powered off or rebooted after the snapshot |
153 | image has been saved. | 153 | image has been saved. |