Module: xenomai-3
Branch: stable-3.0.x
Commit: 3d7cab71c44c341ff465ca7ea2a1562ceae1e125
URL:    
http://git.xenomai.org/?p=xenomai-3.git;a=commit;h=3d7cab71c44c341ff465ca7ea2a1562ceae1e125

Author: Philippe Gerum <r...@xenomai.org>
Date:   Thu Sep  8 16:29:38 2016 +0200

cobalt/x86: fpu: drop obsolete xnarch_save_fpu()

---

 kernel/cobalt/arch/x86/include/asm/xenomai/thread.h |    2 --
 kernel/cobalt/arch/x86/thread.c                     |   17 -----------------
 2 files changed, 19 deletions(-)

diff --git a/kernel/cobalt/arch/x86/include/asm/xenomai/thread.h 
b/kernel/cobalt/arch/x86/include/asm/xenomai/thread.h
index 3862e33..bd39f5a 100644
--- a/kernel/cobalt/arch/x86/include/asm/xenomai/thread.h
+++ b/kernel/cobalt/arch/x86/include/asm/xenomai/thread.h
@@ -59,8 +59,6 @@ static inline int xnarch_shadow_p(struct xnarchtcb *tcb, 
struct task_struct *tas
                                 ((d)->exception == 1 || (d)->exception == 3))
 #define xnarch_fault_notify(d) (!xnarch_fault_bp_p(d))
 
-void xnarch_save_fpu(struct xnthread *thread);
-
 void xnarch_switch_fpu(struct xnthread *from, struct xnthread *to);
 
 int xnarch_handle_fpu_fault(struct xnthread *from, 
diff --git a/kernel/cobalt/arch/x86/thread.c b/kernel/cobalt/arch/x86/thread.c
index d367d13..0383f00 100644
--- a/kernel/cobalt/arch/x86/thread.c
+++ b/kernel/cobalt/arch/x86/thread.c
@@ -289,8 +289,6 @@ int xnarch_handle_fpu_fault(struct xnthread *from,
                /*
                 * The faulting task is a shadow using the FPU for the first
                 * time, initialize the FPU context and tell linux about it.
-                * The fpu usage bit is necessary for xnarch_save_fpu() to
-                * save the FPU state at next switch.
                 */
                __asm__ __volatile__("clts; fninit");
 
@@ -346,21 +344,6 @@ void xnarch_leave_root(struct xnthread *root)
        kernel_fpu_enable();
 }
 
-void xnarch_save_fpu(struct xnthread *thread)
-{
-       struct xnarchtcb *tcb = xnthread_archtcb(thread);
-       struct task_struct *p = tcb->core.host_task;
-
-       if (__thread_has_fpu(p) == 0)
-               /* Saved by last __switch_to */
-               return;
-       
-       clts();
-
-       __do_save_i387(x86_fpustate_ptr(&p->thread));
-       __thread_clear_has_fpu(p);
-}
-
 void xnarch_switch_fpu(struct xnthread *from, struct xnthread *to)
 {
        x86_fpustate *const from_fpup = from ? from->tcb.fpup : NULL;


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