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Use local struct proc variables to reduce repeated td->td_proc dereferences

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and improve readability.
This commit is contained in:
jhb 2003-04-17 22:02:47 +00:00
parent ac139f5914
commit e7a906488e
4 changed files with 30 additions and 23 deletions
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24
sys/compat/linux/linux_misc.c
View File

@ -164,6 +164,7 @@ linux_alarm(struct thread *td, struct linux_alarm_args *args)
{
struct itimerval it, old_it;
struct timeval tv;
struct proc *p;
#ifdef DEBUG
if (ldebug(alarm))
@ -177,18 +178,19 @@ linux_alarm(struct thread *td, struct linux_alarm_args *args)
it.it_value.tv_usec = 0;
it.it_interval.tv_sec = 0;
it.it_interval.tv_usec = 0;
PROC_LOCK(td->td_proc);
old_it = td->td_proc->p_realtimer;
p = td->td_proc;
PROC_LOCK(p);
old_it = p->p_realtimer;
getmicrouptime(&tv);
if (timevalisset(&old_it.it_value))
callout_stop(&td->td_proc->p_itcallout);
callout_stop(&p->p_itcallout);
if (it.it_value.tv_sec != 0) {
callout_reset(&td->td_proc->p_itcallout, tvtohz(&it.it_value),
realitexpire, td->td_proc);
callout_reset(&p->p_itcallout, tvtohz(&it.it_value),
realitexpire, p);
timevaladd(&it.it_value, &tv);
}
td->td_proc->p_realtimer = it;
PROC_UNLOCK(td->td_proc);
p->p_realtimer = it;
PROC_UNLOCK(p);
if (timevalcmp(&old_it.it_value, &tv, >)) {
timevalsub(&old_it.it_value, &tv);
if (old_it.it_value.tv_usec != 0)
@ -809,6 +811,7 @@ linux_wait4(struct thread *td, struct linux_wait4_args *args)
struct rusage *rusage;
} */ tmp;
int error, tmpstat;
struct proc *p;
#ifdef DEBUG
if (ldebug(wait4))
@ -828,9 +831,10 @@ linux_wait4(struct thread *td, struct linux_wait4_args *args)
if ((error = wait4(td, &tmp)) != 0)
return error;
PROC_LOCK(td->td_proc);
SIGDELSET(td->td_proc->p_siglist, SIGCHLD);
PROC_UNLOCK(td->td_proc);
p = td->td_proc;
PROC_LOCK(p);
SIGDELSET(p->p_siglist, SIGCHLD);
PROC_UNLOCK(p);
if (args->status) {
if ((error = copyin(args->status, &tmpstat, sizeof(int))) != 0)

12
sys/compat/svr4/svr4_signal.c
View File

@ -554,21 +554,21 @@ svr4_sys_sigpending(td, uap)
struct thread *td;
struct svr4_sys_sigpending_args *uap;
{
struct proc *p;
sigset_t bss;
int *retval;
svr4_sigset_t sss;
DPRINTF(("@@@ svr4_sys_sigpending(%d)\n", td->td_proc->p_pid));
retval = td->td_retval;
p = td->td_proc;
DPRINTF(("@@@ svr4_sys_sigpending(%d)\n", p->p_pid));
switch (uap->what) {
case 1: /* sigpending */
if (uap->mask == NULL)
return 0;
PROC_LOCK(td->td_proc);
bss = td->td_proc->p_siglist;
PROC_LOCK(p);
bss = p->p_siglist;
SIGSETOR(bss, td->td_siglist);
SIGSETAND(bss, td->td_sigmask);
PROC_UNLOCK(td->td_proc);
PROC_UNLOCK(p);
bsd_to_svr4_sigset(&bss, &sss);
break;

9
sys/gnu/i386/fpemul/fpu_entry.c
View File

@ -198,7 +198,7 @@ char emulating = 0;
static int
math_emulate(struct trapframe * tframe)
{
struct proc *p;
unsigned char FPU_modrm;
unsigned short code;
#ifdef LOOKAHEAD_LIMIT
@ -232,10 +232,11 @@ math_emulate(struct trapframe * tframe)
#endif
FPU_lookahead = FPU_LOOKAHEAD;
PROC_LOCK(curthread->td_proc);
if (curproc->p_flag & P_TRACED)
p = curthread->td_proc;
PROC_LOCK(p);
if (p->p_flag & P_TRACED)
FPU_lookahead = 0;
PROC_UNLOCK(curthread->td_proc);
PROC_UNLOCK(p);
do_another_FPU_instruction:

8
sys/kern/kern_intr.c
View File

@ -569,15 +569,17 @@ ithread_loop(void *arg)
static void
start_softintr(void *dummy)
{
struct proc *p;
if (swi_add(&clk_ithd, "clock", softclock, NULL, SWI_CLOCK,
INTR_MPSAFE, &softclock_ih) ||
swi_add(NULL, "vm", swi_vm, NULL, SWI_VM, 0, &vm_ih))
panic("died while creating standard software ithreads");
PROC_LOCK(clk_ithd->it_td->td_proc);
clk_ithd->it_td->td_proc->p_flag |= P_NOLOAD;
PROC_UNLOCK(clk_ithd->it_td->td_proc);
p = clk_ithd->it_td->td_proc;
PROC_LOCK(p);
p->p_flag |= P_NOLOAD;
PROC_UNLOCK(p);
}
SYSINIT(start_softintr, SI_SUB_SOFTINTR, SI_ORDER_FIRST, start_softintr, NULL)