Update to kernel-4.2 modified fixed-point arithmetics (breaks build on

pre-4.2 kernels)

diff --git a/klgd_ff_plugin.c b/klgd_ff_plugin.c
index 92951e235c06e149260f8a13be79de6876f19e38..2886760c9f263936835e024c99a0d7409b439d1c 100644 (file)
--- a/klgd_ff_plugin.c
+++ b/klgd_ff_plugin.c
@@ -4,6 +4,7 @@
 #include <linux/jiffies.h>
 
 #define DIR_TO_DEGREES(dir) (360 - ((((dir > 0xc000) ? (u32)dir + 0x4000 - 0xffff : (u32)dir + 0x4000) * 360) / 0xffff))
+#define FRAC_16 8
 #define RECALC_DELTA_T_MSEC 20
 
 static int ffpl_handle_state_change(struct klgd_plugin_private *priv, struct klgd_command_stream *s, struct ffpl_effect *eff,
@@ -154,8 +155,8 @@ bool ffpl_constant_force_to_x_y(const struct ff_effect *eff, s32 *x, s32 *y)
 
        degrees = DIR_TO_DEGREES(eff->direction);
        printk(KERN_NOTICE "KLGDFF: DIR_TO_DEGREES > Dir: %u, Deg: %u\n", eff->direction, degrees);
-       *x += (eff->u.constant.level * fixp_cos(degrees)) >> FRAC_N;
-       *y += (eff->u.constant.level * fixp_sin(degrees)) >> FRAC_N;
+       *x += (eff->u.constant.level * fixp_cos16(degrees)) >> FRAC_16;
+       *y += (eff->u.constant.level * fixp_sin16(degrees)) >> FRAC_16;
 
        return true;
 }