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authorKumar Gala <galak@kernel.crashing.org>2007-10-06 23:36:26 +0200
committerAdrian Bunk <bunk@kernel.org>2007-10-06 23:36:26 +0200
commitcc6b1c0e31e1f639d3c5e161039c24edb41c4537 (patch)
treeb2bc173f09d43759d20b4574f065dbc099a4c5f9
parentbffb5afd17f7f791f627ef65425f3c4cb9e43095 (diff)
[POWERPC] Flush registers to proper task context
When we flush register state for FP, Altivec, or SPE in flush_*_to_thread we need to respect the task_struct that the caller has passed to us. Most cases we are called with current, however sometimes (ptrace) we may be passed a different task_struct. This showed up when using gdbserver debugging a simple program that used floating point. When gdb tried to show the FP regs they all showed up as 0, because the child's FP registers were never properly flushed to memory. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Adrian Bunk <bunk@kernel.org>
-rw-r--r--arch/powerpc/kernel/process.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index c225cf154bfe..b7b3588bfaab 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -87,7 +87,7 @@ void flush_fp_to_thread(struct task_struct *tsk)
*/
BUG_ON(tsk != current);
#endif
- giveup_fpu(current);
+ giveup_fpu(tsk);
}
preempt_enable();
}
@@ -147,7 +147,7 @@ void flush_altivec_to_thread(struct task_struct *tsk)
#ifdef CONFIG_SMP
BUG_ON(tsk != current);
#endif
- giveup_altivec(current);
+ giveup_altivec(tsk);
}
preempt_enable();
}
@@ -186,7 +186,7 @@ void flush_spe_to_thread(struct task_struct *tsk)
#ifdef CONFIG_SMP
BUG_ON(tsk != current);
#endif
- giveup_spe(current);
+ giveup_spe(tsk);
}
preempt_enable();
}