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sparc32, copy_thread: Clear TIF_USEDFPU flag of created task instead of current 

FPU state is saved into task_struct of created task. Current task continues
use of the state, so it needs TIF_USEDFPU flag is not cleared.

Created task receives fresh FPU and cleared TIF_USEFPU flag is required for it.

Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tkhai Kirill 2012-06-29 02:55:25 +00:00 committed by David S. Miller
parent a0ce3ba03f
commit 427f23cb3a
1 changed files with 1 additions and 3 deletions
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4
arch/sparc/kernel/process_32.c
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@ -333,9 +333,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
put_psr(get_psr() | PSR_EF); put_psr(get_psr() | PSR_EF);
fpsave(&p->thread.float_regs[0], &p->thread.fsr, fpsave(&p->thread.float_regs[0], &p->thread.fsr,
&p->thread.fpqueue[0], &p->thread.fpqdepth); &p->thread.fpqueue[0], &p->thread.fpqdepth);
#ifdef CONFIG_SMP
clear_thread_flag(TIF_USEDFPU);
#endif
} }
/* /*
@ -413,6 +410,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
/* FPU must be disabled on SMP. */ /* FPU must be disabled on SMP. */
childregs->psr &= ~PSR_EF; childregs->psr &= ~PSR_EF;
clear_tsk_thread_flag(p, TIF_USEDFPU);
#endif #endif
/* Set the return value for the child. */ /* Set the return value for the child. */