Rusty Russell 9bea7f2395 module: fix bne2 "gave up waiting for init of module libcrc32c" ... Problem: it's hard to avoid an init routine stumbling over a request_module these days. And it's not clear it's always a bad idea: for example, a module like kvm with dynamic dependencies on kvm-intel or kvm-amd would be neater if it could simply request_module the right one. In this particular case, it's libcrc32c: libcrc32c_mod_init crypto_alloc_shash crypto_alloc_tfm crypto_find_alg crypto_alg_mod_lookup crypto_larval_lookup request_module If another module is waiting inside resolve_symbol() for libcrc32c to finish initializing (ie. bne2 depends on libcrc32c) then it does so holding the module lock, and our request_module() can't make progress until that is released. Waiting inside resolve_symbol() without the lock isn't all that hard: we just need to pass the -EBUSY up the call chain so we can sleep where we don't hold the lock. Error reporting is a bit trickier: we need to copy the name of the unfinished module before releasing the lock. Other notes: 1) This also fixes a theoretical issue where a weak dependency would allow symbol version mismatches to be ignored. 2) We rename use_module to ref_module to make life easier for the only external user (the out-of-tree ksplice patches). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Tim Abbot <tabbott@ksplice.com> Tested-by: Brandon Philips <bphilips@suse.de>		2010-06-05 11:17:37 +09:30
..
debug	module: fix kdb's illicit use of struct module_use.	2010-06-05 11:17:36 +09:30
gcov
irq
power
time
trace	blktrace: Fix new kernel-doc warnings	2010-05-31 09:58:20 +02:00
.gitignore
acct.c
async.c
audit.c
audit.h
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
cgroup.c
cgroup_freezer.c
compat.c
configs.c
cpu.c	fix cpu_chain section mismatch...	2010-06-01 09:22:50 -07:00
cpuset.c
cred.c
delayacct.c
dma.c
early_res.c
elfcore.c
exec_domain.c
exit.c
extable.c
fork.c	Revert "cpusets: randomize node rotor used in cpuset_mem_spread_node()"	2010-05-30 09:00:03 -07:00
freezer.c
futex.c
futex_compat.c
groups.c
hrtimer.c
hung_task.c
hw_breakpoint.c
itimer.c
kallsyms.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c
kfifo.c
kmod.c
kprobes.c
ksysfs.c
kthread.c
latencytop.c
lockdep.c
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile
module.c	module: fix bne2 "gave up waiting for init of module libcrc32c"	2010-06-05 11:17:37 +09:30
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
notifier.c
ns_cgroup.c
nsproxy.c
padata.c
panic.c
params.c
perf_event.c	perf: Fix crash in swevents	2010-06-03 17:03:08 +02:00
pid.c
pid_namespace.c
pm_qos_params.c
posix-cpu-timers.c
posix-timers.c
printk.c
profile.c
ptrace.c
range.c
rcupdate.c
rcutiny.c
rcutiny_plugin.h
rcutorture.c
rcutree.c
rcutree.h
rcutree_plugin.h
rcutree_trace.c
relay.c
res_counter.c
resource.c
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c	sched: Fix wake_affine() vs RT tasks	2010-06-01 09:27:16 +02:00
sched_clock.c
sched_cpupri.c
sched_cpupri.h
sched_debug.c
sched_fair.c	sched: Fix wake_affine() vs RT tasks	2010-06-01 09:27:16 +02:00
sched_features.h
sched_idletask.c
sched_rt.c
sched_stats.h
seccomp.c
semaphore.c
signal.c
slow-work-debugfs.c
slow-work.c
slow-work.h
smp.c
softirq.c
softlockup.c
spinlock.c
srcu.c
stacktrace.c
stop_machine.c	sched: Make sure timers have migrated before killing the migration_thread	2010-05-31 08:37:44 +02:00
sys.c
sys_ni.c
sysctl.c
sysctl_binary.c
sysctl_check.c
taskstats.c
test_kprobes.c
time.c
timeconst.pl
timer.c
tracepoint.c
tsacct.c
uid16.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
wait.c
workqueue.c