diff options
| author | jhb <jhb@FreeBSD.org> | 2001-03-07 03:37:06 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2001-03-07 03:37:06 +0000 |
| commit | 9cd254601baefc2dc9c953abe9747717374ff8b1 (patch) | |
| tree | ac4298224e8af28e8b2f904a43a2925c21dfc798 /sys/i386/isa/pcvt/pcvt_ext.c | |
| parent | ace71d59bf35fa6d911520ec855d0100773422a8 (diff) | |
| download | FreeBSD-src-9cd254601baefc2dc9c953abe9747717374ff8b1.zip FreeBSD-src-9cd254601baefc2dc9c953abe9747717374ff8b1.tar.gz | |
Grab the process lock while calling psignal and before calling psignal.
Diffstat (limited to 'sys/i386/isa/pcvt/pcvt_ext.c')
| -rw-r--r-- | sys/i386/isa/pcvt/pcvt_ext.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/sys/i386/isa/pcvt/pcvt_ext.c b/sys/i386/isa/pcvt/pcvt_ext.c index 50ded4e..3f0e954 100644 --- a/sys/i386/isa/pcvt/pcvt_ext.c +++ b/sys/i386/isa/pcvt/pcvt_ext.c @@ -2294,11 +2294,17 @@ vgapage(int new_screen) /* Try resignaling uncooperative X-window servers */ if (vsp->smode.mode == VT_PROCESS) { if (vsp->vt_status & VT_WAIT_REL) { - if(vsp->smode.relsig) + if(vsp->smode.relsig) { + PROC_LOCK(vsp->proc); psignal(vsp->proc, vsp->smode.relsig); + PROC_UNLOCK(vsp->proc); + } } else if (vsp->vt_status & VT_WAIT_ACK) { - if(vsp->smode.acqsig) + if(vsp->smode.acqsig) { + PROC_LOCK(vsp->proc); psignal(vsp->proc, vsp->smode.acqsig); + PROC_UNLOCK(vsp->proc); + } } } return EAGAIN; @@ -2310,8 +2316,11 @@ vgapage(int new_screen) { /* we cannot switch immediately here */ vsp->vt_status |= VT_WAIT_REL; - if(vsp->smode.relsig) + if(vsp->smode.relsig) { + PROC_LOCK(vsp->proc); psignal(vsp->proc, vsp->smode.relsig); + PROC_UNLOCK(vsp->proc); + } } else { @@ -2341,8 +2350,11 @@ vgapage(int new_screen) { /* if _new_ vt is under process control... */ vsp->vt_status |= VT_WAIT_ACK; - if(vsp->smode.acqsig) + if(vsp->smode.acqsig) { + PROC_LOCK(vsp->proc); psignal(vsp->proc, vsp->smode.acqsig); + PROC_UNLOCK(vsp->proc); + } } else { @@ -2502,9 +2514,12 @@ usl_vt_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p) */ vsp->vt_status |= VT_WAIT_ACK; - if(vsp->smode.acqsig) + if(vsp->smode.acqsig) { + PROC_LOCK(vsp->proc); psignal(vsp->proc, vsp->smode.acqsig); + PROC_UNLOCK(vsp->proc); + } } else { |
