KVM: PPC: Expose level based interrupt cap

[pandora-kernel.git] / include / linux / device-mapper.h

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 1381cd9..2970022 100644 (file)
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -22,7 +22,7 @@ typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t;
 union map_info {
        void *ptr;
        unsigned long long ll;
-       unsigned flush_request;
+       unsigned target_request_nr;
 };
 
 /*
@@ -174,12 +174,18 @@ struct dm_target {
         * A number of zero-length barrier requests that will be submitted
         * to the target for the purpose of flushing cache.
         *
-        * The request number will be placed in union map_info->flush_request.
+        * The request number will be placed in union map_info->target_request_nr.
         * It is a responsibility of the target driver to remap these requests
         * to the real underlying devices.
         */
        unsigned num_flush_requests;
 
+       /*
+        * The number of discard requests that will be submitted to the
+        * target.  map_info->request_nr is used just like num_flush_requests.
+        */
+       unsigned num_discard_requests;
+
        /* target specific data */
        void *private;
 
@@ -392,6 +398,12 @@ void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
 #define dm_array_too_big(fixed, obj, num) \
        ((num) > (UINT_MAX - (fixed)) / (obj))
 
+/*
+ * Sector offset taken relative to the start of the target instead of
+ * relative to the start of the device.
+ */
+#define dm_target_offset(ti, sector) ((sector) - (ti)->begin)
+
 static inline sector_t to_sector(unsigned long n)
 {
        return (n >> SECTOR_SHIFT);