Author: attilio
Date: Thu Sep 13 22:26:22 2012
New Revision: 240475
URL: http://svn.freebsd.org/changeset/base/240475
Log:
Remove all the checks on curthread != NULL with the exception of some MD
trap checks (eg. printtrap()).
Generally this check is not needed anymore, as there is not a legitimate
case where curthread != NULL, after pcpu 0 area has been properly
initialized.
Reviewed by: bde, jhb
MFC after: 1 week
Modified:
head/sys/dev/hwpmc/hwpmc_arm.c
head/sys/dev/hwpmc/hwpmc_x86.c
head/sys/kern/kern_condvar.c
head/sys/kern/kern_mutex.c
head/sys/kern/kern_rwlock.c
head/sys/kern/kern_sx.c
head/sys/kern/kern_thread.c
head/sys/kern/vfs_subr.c
Modified: head/sys/dev/hwpmc/hwpmc_arm.c
==============================================================================
--- head/sys/dev/hwpmc/hwpmc_arm.c Thu Sep 13 19:08:31 2012
(r240474)
+++ head/sys/dev/hwpmc/hwpmc_arm.c Thu Sep 13 22:26:22 2012
(r240475)
@@ -75,12 +75,10 @@ pmc_save_kernel_callchain(uintptr_t *cc,
KASSERT(TRAPF_USERMODE(tf) == 0,("[arm,%d] not a kernel backtrace",
__LINE__));
+ td = curthread;
pc = PMC_TRAPFRAME_TO_PC(tf);
*cc++ = pc;
- if ((td = curthread) == NULL)
- return (1);
-
if (maxsamples <= 1)
return (1);
@@ -126,12 +124,10 @@ pmc_save_user_callchain(uintptr_t *cc, i
KASSERT(TRAPF_USERMODE(tf), ("[x86,%d] Not a user trap frame tf=%p",
__LINE__, (void *) tf));
+ td = curthread;
pc = PMC_TRAPFRAME_TO_PC(tf);
*cc++ = pc;
- if ((td = curthread) == NULL)
- return (1);
-
if (maxsamples <= 1)
return (1);
Modified: head/sys/dev/hwpmc/hwpmc_x86.c
==============================================================================
--- head/sys/dev/hwpmc/hwpmc_x86.c Thu Sep 13 19:08:31 2012
(r240474)
+++ head/sys/dev/hwpmc/hwpmc_x86.c Thu Sep 13 22:26:22 2012
(r240475)
@@ -161,6 +161,7 @@ pmc_save_kernel_callchain(uintptr_t *cc,
KASSERT(TRAPF_USERMODE(tf) == 0,("[x86,%d] not a kernel backtrace",
__LINE__));
+ td = curthread;
pc = PMC_TRAPFRAME_TO_PC(tf);
fp = PMC_TRAPFRAME_TO_FP(tf);
sp = PMC_TRAPFRAME_TO_KERNEL_SP(tf);
@@ -168,9 +169,6 @@ pmc_save_kernel_callchain(uintptr_t *cc,
*cc++ = pc;
r = fp + sizeof(uintptr_t); /* points to return address */
- if ((td = curthread) == NULL)
- return (1);
-
if (nframes <= 1)
return (1);
Modified: head/sys/kern/kern_condvar.c
==============================================================================
--- head/sys/kern/kern_condvar.c Thu Sep 13 19:08:31 2012
(r240474)
+++ head/sys/kern/kern_condvar.c Thu Sep 13 22:26:22 2012
(r240475)
@@ -50,7 +50,7 @@ __FBSDID("$FreeBSD$");
* Common sanity checks for cv_wait* functions.
*/
#define CV_ASSERT(cvp, lock, td) do {
\
- KASSERT((td) != NULL, ("%s: curthread NULL", __func__)); \
+ KASSERT((td) != NULL, ("%s: td NULL", __func__)); \
KASSERT(TD_IS_RUNNING(td), ("%s: not TDS_RUNNING", __func__)); \
KASSERT((cvp) != NULL, ("%s: cvp NULL", __func__)); \
KASSERT((lock) != NULL, ("%s: lock NULL", __func__)); \
Modified: head/sys/kern/kern_mutex.c
==============================================================================
--- head/sys/kern/kern_mutex.c Thu Sep 13 19:08:31 2012 (r240474)
+++ head/sys/kern/kern_mutex.c Thu Sep 13 22:26:22 2012 (r240475)
@@ -200,7 +200,6 @@ _mtx_lock_flags(struct mtx *m, int opts,
if (SCHEDULER_STOPPED())
return;
- MPASS(curthread != NULL);
KASSERT(!TD_IS_IDLETHREAD(curthread),
("mtx_lock() by idle thread %p on sleep mutex %s @ %s:%d",
curthread, m->lock_object.lo_name, file, line));
@@ -225,7 +224,6 @@ _mtx_unlock_flags(struct mtx *m, int opt
if (SCHEDULER_STOPPED())
return;
- MPASS(curthread != NULL);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_unlock() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_sleep,
@@ -248,7 +246,6 @@ _mtx_lock_spin_flags(struct mtx *m, int
if (SCHEDULER_STOPPED())
return;
- MPASS(curthread != NULL);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_lock_spin() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
@@ -272,7 +269,6 @@ _mtx_unlock_spin_flags(struct mtx *m, in
if (SCHEDULER_STOPPED())
return;
- MPASS(curthread != NULL);
KASSERT(m->mtx_lock != MTX_DESTROYED,
("mtx_unlock_spin() of destroyed mutex @ %s:%d", file, line));
KASSERT(LOCK_CLASS(&m->lock_object) == &lock_class_mtx_spin,
@@ -303,7 +299,6 @@ mtx_trylock_flags_(struct mtx *m, int op
if (SCHEDULER_STOPPED())
return (1);
- MPASS(curthread != NULL);
KASSERT(!TD_IS_IDLETHREAD(curthread),
("mtx_trylock() by idle thread %p on sleep mutex %s @ %s:%d",
curthread, m->lock_object.lo_name, file, line));
Modified: head/sys/kern/kern_rwlock.c
==============================================================================
--- head/sys/kern/kern_rwlock.c Thu Sep 13 19:08:31 2012 (r240474)
+++ head/sys/kern/kern_rwlock.c Thu Sep 13 22:26:22 2012 (r240475)
@@ -241,7 +241,6 @@ _rw_wlock(struct rwlock *rw, const char
if (SCHEDULER_STOPPED())
return;
- MPASS(curthread != NULL);
KASSERT(!TD_IS_IDLETHREAD(curthread),
("rw_wlock() by idle thread %p on rwlock %s @ %s:%d",
curthread, rw->lock_object.lo_name, file, line));
@@ -292,7 +291,6 @@ _rw_wunlock(struct rwlock *rw, const cha
if (SCHEDULER_STOPPED())
return;
- MPASS(curthread != NULL);
KASSERT(rw->rw_lock != RW_DESTROYED,
("rw_wunlock() of destroyed rwlock @ %s:%d", file, line));
_rw_assert(rw, RA_WLOCKED, file, line);
Modified: head/sys/kern/kern_sx.c
==============================================================================
--- head/sys/kern/kern_sx.c Thu Sep 13 19:08:31 2012 (r240474)
+++ head/sys/kern/kern_sx.c Thu Sep 13 22:26:22 2012 (r240475)
@@ -249,7 +249,6 @@ _sx_slock(struct sx *sx, int opts, const
if (SCHEDULER_STOPPED())
return (0);
- MPASS(curthread != NULL);
KASSERT(!TD_IS_IDLETHREAD(curthread),
("sx_slock() by idle thread %p on sx %s @ %s:%d",
curthread, sx->lock_object.lo_name, file, line));
@@ -303,7 +302,6 @@ _sx_xlock(struct sx *sx, int opts, const
if (SCHEDULER_STOPPED())
return (0);
- MPASS(curthread != NULL);
KASSERT(!TD_IS_IDLETHREAD(curthread),
("sx_xlock() by idle thread %p on sx %s @ %s:%d",
curthread, sx->lock_object.lo_name, file, line));
@@ -330,7 +328,6 @@ sx_try_xlock_(struct sx *sx, const char
if (SCHEDULER_STOPPED())
return (1);
- MPASS(curthread != NULL);
KASSERT(!TD_IS_IDLETHREAD(curthread),
("sx_try_xlock() by idle thread %p on sx %s @ %s:%d",
curthread, sx->lock_object.lo_name, file, line));
@@ -361,7 +358,6 @@ _sx_sunlock(struct sx *sx, const char *f
if (SCHEDULER_STOPPED())
return;
- MPASS(curthread != NULL);
KASSERT(sx->sx_lock != SX_LOCK_DESTROYED,
("sx_sunlock() of destroyed sx @ %s:%d", file, line));
_sx_assert(sx, SA_SLOCKED, file, line);
@@ -378,7 +374,6 @@ _sx_xunlock(struct sx *sx, const char *f
if (SCHEDULER_STOPPED())
return;
- MPASS(curthread != NULL);
KASSERT(sx->sx_lock != SX_LOCK_DESTROYED,
("sx_xunlock() of destroyed sx @ %s:%d", file, line));
_sx_assert(sx, SA_XLOCKED, file, line);
Modified: head/sys/kern/kern_thread.c
==============================================================================
--- head/sys/kern/kern_thread.c Thu Sep 13 19:08:31 2012 (r240474)
+++ head/sys/kern/kern_thread.c Thu Sep 13 22:26:22 2012 (r240475)
@@ -622,7 +622,6 @@ thread_single(int mode)
p = td->td_proc;
mtx_assert(&Giant, MA_NOTOWNED);
PROC_LOCK_ASSERT(p, MA_OWNED);
- KASSERT((td != NULL), ("curthread is NULL"));
if ((p->p_flag & P_HADTHREADS) == 0)
return (0);
Modified: head/sys/kern/vfs_subr.c
==============================================================================
--- head/sys/kern/vfs_subr.c Thu Sep 13 19:08:31 2012 (r240474)
+++ head/sys/kern/vfs_subr.c Thu Sep 13 22:26:22 2012 (r240475)
@@ -3416,7 +3416,6 @@ vfs_unmountall(void)
struct thread *td;
int error;
- KASSERT(curthread != NULL, ("vfs_unmountall: NULL curthread"));
CTR1(KTR_VFS, "%s: unmounting all filesystems", __func__);
td = curthread;
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