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authorDavid S. Miller <davem@davemloft.net>2008-05-15 03:34:44 -0400
committerDavid S. Miller <davem@davemloft.net>2008-05-15 03:34:44 -0400
commit63fe46da9c380b3f2bbdf3765044649517cc717c (patch)
tree9478c1aca1d692b408955aea20c9cd9a37e589c0 /arch/x86/kernel/i387.c
parent99dd1a2b8347ac2ae802300b7862f6f7bcf17139 (diff)
parent066b2118976e6e7cc50eed39e2747c75343a23c4 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: drivers/net/wireless/iwlwifi/iwl-4965-rs.c drivers/net/wireless/rt2x00/rt61pci.c
Diffstat (limited to 'arch/x86/kernel/i387.c')
-rw-r--r--arch/x86/kernel/i387.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index db6839b53195..e03cc952f233 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -450,7 +450,6 @@ static inline int restore_i387_fsave(struct _fpstate_ia32 __user *buf)
450{ 450{
451 struct task_struct *tsk = current; 451 struct task_struct *tsk = current;
452 452
453 clear_fpu(tsk);
454 return __copy_from_user(&tsk->thread.xstate->fsave, buf, 453 return __copy_from_user(&tsk->thread.xstate->fsave, buf,
455 sizeof(struct i387_fsave_struct)); 454 sizeof(struct i387_fsave_struct));
456} 455}
@@ -461,7 +460,6 @@ static int restore_i387_fxsave(struct _fpstate_ia32 __user *buf)
461 struct user_i387_ia32_struct env; 460 struct user_i387_ia32_struct env;
462 int err; 461 int err;
463 462
464 clear_fpu(tsk);
465 err = __copy_from_user(&tsk->thread.xstate->fxsave, &buf->_fxsr_env[0], 463 err = __copy_from_user(&tsk->thread.xstate->fxsave, &buf->_fxsr_env[0],
466 sizeof(struct i387_fxsave_struct)); 464 sizeof(struct i387_fxsave_struct));
467 /* mxcsr reserved bits must be masked to zero for security reasons */ 465 /* mxcsr reserved bits must be masked to zero for security reasons */
@@ -478,6 +476,16 @@ int restore_i387_ia32(struct _fpstate_ia32 __user *buf)
478 int err; 476 int err;
479 477
480 if (HAVE_HWFP) { 478 if (HAVE_HWFP) {
479 struct task_struct *tsk = current;
480
481 clear_fpu(tsk);
482
483 if (!used_math()) {
484 err = init_fpu(tsk);
485 if (err)
486 return err;
487 }
488
481 if (cpu_has_fxsr) 489 if (cpu_has_fxsr)
482 err = restore_i387_fxsave(buf); 490 err = restore_i387_fxsave(buf);
483 else 491 else