Generic (within Suspend2) routine for reading a proc file entry all our
proc entries use this routine, so there is no duplication of code at all.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/proc.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 70 insertions(+), 0 deletions(-)
diff --git a/kernel/power/proc.c b/kernel/power/proc.c
index 16ad90e..e072b50 100644
--- a/kernel/power/proc.c
+++ b/kernel/power/proc.c
@@ -28,3 +28,73 @@ static struct suspend_proc_data proc_par
extern void __suspend_try_resume(void);
extern void suspend_main(void);
+/* suspend_read_proc
+ *
+ * Generic handling for reading the contents of bits, integers,
+ * unsigned longs and strings.
+ */
+static int suspend_read_proc(char *page, char **start, off_t off, int count,
+ int *eof, void *data)
+{
+ int len = 0;
+ struct suspend_proc_data *proc_data = (struct suspend_proc_data *) data;
+
+ if (suspend_start_anything(0))
+ return -EBUSY;
+
+ if (proc_data->needs_storage_manager & 1)
+ suspend_prepare_usm();
+
+ switch (proc_data->type) {
+ case SUSPEND_PROC_DATA_CUSTOM:
+ if (proc_data->data.special.read_proc) {
+ read_proc_t *read_proc = proc_data->data.special.read_proc;
+ len = read_proc(page, start, off, count, eof, data);
+ } else
+ len = 0;
+ break;
+ case SUSPEND_PROC_DATA_BIT:
+ len = sprintf(page, "%d\n",
+ -test_bit(proc_data->data.bit.bit,
+ proc_data->data.bit.bit_vector));
+ break;
+ case SUSPEND_PROC_DATA_INTEGER:
+ {
+ int *variable = proc_data->data.integer.variable;
+ len = sprintf(page, "%d\n", *variable);
+ break;
+ }
+ case SUSPEND_PROC_DATA_LONG:
+ {
+ long *variable = proc_data->data.a_long.variable;
+ len = sprintf(page, "%ld\n", *variable);
+ break;
+ }
+ case SUSPEND_PROC_DATA_UL:
+ {
+ long *variable = proc_data->data.ul.variable;
+ len = sprintf(page, "%lu\n", *variable);
+ break;
+ }
+ case SUSPEND_PROC_DATA_STRING:
+ {
+ char *variable = proc_data->data.string.variable;
+ len = sprintf(page, "%s\n", variable);
+ break;
+ }
+ }
+ /* Side effect routine? */
+ if (proc_data->read_proc)
+ proc_data->read_proc();
+
+ if (len <= count)
+ *eof = 1;
+
+ if (proc_data->needs_storage_manager & 1)
+ suspend_cleanup_usm();
+
+ suspend_finish_anything(0);
+
+ return len;
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
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