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| author | nyan <nyan@FreeBSD.org> | 2007-05-21 11:57:36 +0000 |
|---|---|---|
| committer | nyan <nyan@FreeBSD.org> | 2007-05-21 11:57:36 +0000 |
| commit | b41a739b99a026e922996a51b8c36460ac643424 (patch) | |
| tree | 744fe8f02c462e6296113b410b00ef4cf5493c79 /sys/pc98 | |
| parent | 9af56a3ee664f965607d695799f8e554cbed4a1a (diff) | |
| download | FreeBSD-src-b41a739b99a026e922996a51b8c36460ac643424.zip FreeBSD-src-b41a739b99a026e922996a51b8c36460ac643424.tar.gz | |
MFi386: revision 1.652
- Move GDT/LDT locking into a seperate spinlock, removing the global
scheduler lock from this responsibility.
Diffstat (limited to 'sys/pc98')
| -rw-r--r-- | sys/pc98/pc98/machdep.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/pc98/pc98/machdep.c b/sys/pc98/pc98/machdep.c index 2d9ca3d..28fff4e 100644 --- a/sys/pc98/pc98/machdep.c +++ b/sys/pc98/pc98/machdep.c @@ -1168,8 +1168,10 @@ exec_setregs(td, entry, stack, ps_strings) pcb->pcb_gs = _udatasel; load_gs(_udatasel); + mtx_lock_spin(&dt_lock); if (td->td_proc->p_md.md_ldt) user_ldt_free(td); + mtx_unlock_spin(&dt_lock); bzero((char *)regs, sizeof(struct trapframe)); regs->tf_eip = entry; @@ -1275,6 +1277,7 @@ static struct gate_descriptor idt0[NIDT]; struct gate_descriptor *idt = &idt0[0]; /* interrupt descriptor table */ union descriptor ldt[NLDT]; /* local descriptor table */ struct region_descriptor r_gdt, r_idt; /* table descriptors */ +struct mtx dt_lock; /* lock for GDT and LDT */ #if defined(I586_CPU) && !defined(NO_F00F_HACK) extern int has_f00f_bug; @@ -1954,6 +1957,7 @@ init386(first) r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1; r_gdt.rd_base = (int) gdt; + mtx_init(&dt_lock, "descriptor tables", NULL, MTX_SPIN); lgdt(&r_gdt); pcpu_init(pc, 0, sizeof(struct pcpu)); |
