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Diffstat (limited to 'include/linux/mtd/map.h')
-rw-r--r--include/linux/mtd/map.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/mtd/map.h b/include/linux/mtd/map.h
index 58f3ba709..5e0eb7cca 100644
--- a/include/linux/mtd/map.h
+++ b/include/linux/mtd/map.h
@@ -240,8 +240,11 @@ struct map_info {
If there is no cache to care about this can be set to NULL. */
void (*inval_cache)(struct map_info *, unsigned long, ssize_t);
- /* set_vpp() must handle being reentered -- enable, enable, disable
- must leave it enabled. */
+ /* This will be called with 1 as parameter when the first map user
+ * needs VPP, and called with 0 when the last user exits. The map
+ * core maintains a reference counter, and assumes that VPP is a
+ * global resource applying to all mapped flash chips on the system.
+ */
void (*set_vpp)(struct map_info *, int);
unsigned long pfow_base;