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authorPaul Mundt <lethal@linux-sh.org>2010-01-13 12:51:40 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-01-13 12:51:40 +0900
commit0ea820cf9bf58f735ed40ec67947159c4f170012 (patch)
tree77320006b4dded5804c678c1a869571be5c0b95f /arch/sh/kernel/signal_32.c
parenta3705799e2cc5fb69d88ad6a7f317a8f5597f18d (diff)
sh: Move over to dynamically allocated FPU context.
This follows the x86 xstate changes and implements a task_xstate slab cache that is dynamically sized to match one of hard FP/soft FP/FPU-less. This also tidies up and consolidates some of the SH-2A/SH-4 FPU fragmentation. Now fpu state restorers are commonly defined, with the init_fpu()/fpu_init() mess reworked to follow the x86 convention. The fpu_init() register initialization has been replaced by xstate setup followed by writing out to hardware via the standard restore path. As init_fpu() now performs a slab allocation a secondary lighterweight restorer is also introduced for the context switch. In the future the DSP state will be rolled in here, too. More work remains for math emulation and the SH-5 FPU, which presently uses its own special (UP-only) interfaces. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/signal_32.c')
-rw-r--r--arch/sh/kernel/signal_32.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 12815ce01ec..6a7cce79eb4 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -150,7 +150,7 @@ static inline int restore_sigcontext_fpu(struct sigcontext __user *sc)
return 0;
set_used_math();
- return __copy_from_user(&tsk->thread.fpu.hard, &sc->sc_fpregs[0],
+ return __copy_from_user(&tsk->thread.xstate->hardfpu, &sc->sc_fpregs[0],
sizeof(long)*(16*2+2));
}
@@ -175,7 +175,7 @@ static inline int save_sigcontext_fpu(struct sigcontext __user *sc,
clear_used_math();
unlazy_fpu(tsk, regs);
- return __copy_to_user(&sc->sc_fpregs[0], &tsk->thread.fpu.hard,
+ return __copy_to_user(&sc->sc_fpregs[0], &tsk->thread.xstate->hardfpu,
sizeof(long)*(16*2+2));
}
#endif /* CONFIG_SH_FPU */