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In fpudna()/npxdna(), mark FPU context initialized and optionally

Browse source 
mark user FPU context initialized, if current context is user context.
It was reversed in r215865, by inadequate change of this code fragment
to a call to fpuuserinited()/npxuserinited().

The issue is only relevant for in-kernel users of FPU.

Reported by:	Jan Henrik Sylvester <me janh de>, Mike Tancsa <mike sentex net>
Tested by:	Mike Tancsa
MFC after:	3 days
This commit is contained in:
Konstantin Belousov 2010-12-12 16:16:39 +00:00
parent 552c039da9
commit 60c7c84e85
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=216394
2 changed files with 6 additions and 2 deletions
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4
sys/amd64/amd64/fpu.c
View file

@ -426,7 +426,9 @@ fpudna(void)
fxrstor(&fpu_initialstate);
if (pcb->pcb_initial_fpucw != __INITIAL_FPUCW__)
fldcw(pcb->pcb_initial_fpucw);
fpuuserinited(curthread);
pcb->pcb_flags |= PCB_FPUINITDONE;
if (PCB_USER_FPU(pcb))
pcb->pcb_flags |= PCB_USERFPUINITDONE;
} else
fxrstor(pcb->pcb_save);
critical_exit();

4
sys/i386/isa/npx.c
View file

@ -684,7 +684,9 @@ npxdna(void)
fpurstor(&npx_initialstate);
if (pcb->pcb_initial_npxcw != __INITIAL_NPXCW__)
fldcw(pcb->pcb_initial_npxcw);
npxuserinited(curthread);
pcb->pcb_flags |= PCB_NPXINITDONE;
if (PCB_USER_FPU(pcb))
pcb->pcb_flags |= PCB_NPXUSERINITDONE;
} else {
/*
* The following fpurstor() may cause an IRQ13 when the