Steven Whitehouse wrote:
> Hi,
>
> Would you like me to take these two GFS2 patches into my git tree for
> the next merge window, or are you intending that these should go to
> Linus in this merge window? Either way I'm happy to add my:
Actually, I hope that all these patches are merged in this merge
window, but if Andrew decides, that these two are not for -mm
tree, then I will be also happy if they stay at your tree up to
the 2.6.26 merge window.
> Signed-off-by: Steven Whitehouse <[EMAIL PROTECTED]>
Thanks! :)
> Steve.
>
> On Tue, 2008-01-29 at 16:55 +0300, Pavel Emelyanov wrote:
>> The gl_owner_pid field is used to get the lock owning
>> task by its pid, so make it in a proper manner, i.e.
>> by using the struct pid pointer and pid_task() function.
>>
>> The pid_task() becomes exported for the gfs2 module.
>>
>> Signed-off-by: Pavel Emelyanov <[EMAIL PROTECTED]>
>>
>> ---
>> fs/gfs2/glock.c | 19 ++++++++++++-------
>> fs/gfs2/incore.h | 2 +-
>> 2 files changed, 13 insertions(+), 8 deletions(-)
>>
>> diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
>> index 80e09c5..5fe585f 100644
>> --- a/fs/gfs2/glock.c
>> +++ b/fs/gfs2/glock.c
>> @@ -334,7 +334,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
>> gl->gl_state = LM_ST_UNLOCKED;
>> gl->gl_demote_state = LM_ST_EXCLUSIVE;
>> gl->gl_hash = hash;
>> - gl->gl_owner_pid = 0;
>> + gl->gl_owner_pid = NULL;
>> gl->gl_ip = 0;
>> gl->gl_ops = glops;
>> gl->gl_req_gh = NULL;
>> @@ -631,7 +631,7 @@ static void gfs2_glmutex_lock(struct gfs2_glock *gl)
>> wait_on_holder(&gh);
>> gfs2_holder_uninit(&gh);
>> } else {
>> - gl->gl_owner_pid = current->pid;
>> + gl->gl_owner_pid = get_pid(task_pid(current));
>> gl->gl_ip = (unsigned long)__builtin_return_address(0);
>> spin_unlock(&gl->gl_spin);
>> }
>> @@ -652,7 +652,7 @@ static int gfs2_glmutex_trylock(struct gfs2_glock *gl)
>> if (test_and_set_bit(GLF_LOCK, &gl->gl_flags)) {
>> acquired = 0;
>> } else {
>> - gl->gl_owner_pid = current->pid;
>> + gl->gl_owner_pid = get_pid(task_pid(current));
>> gl->gl_ip = (unsigned long)__builtin_return_address(0);
>> }
>> spin_unlock(&gl->gl_spin);
>> @@ -668,12 +668,17 @@ static int gfs2_glmutex_trylock(struct gfs2_glock *gl)
>>
>> static void gfs2_glmutex_unlock(struct gfs2_glock *gl)
>> {
>> + struct pid *pid;
>> +
>> spin_lock(&gl->gl_spin);
>> clear_bit(GLF_LOCK, &gl->gl_flags);
>> - gl->gl_owner_pid = 0;
>> + pid = gl->gl_owner_pid;
>> + gl->gl_owner_pid = NULL;
>> gl->gl_ip = 0;
>> run_queue(gl);
>> spin_unlock(&gl->gl_spin);
>> +
>> + put_pid(pid);
>> }
>>
>> /**
>> @@ -1877,13 +1882,13 @@ static int dump_glock(struct glock_iter *gi, struct
>> gfs2_glock *gl)
>> print_dbg(gi, " gl_ref = %d\n", atomic_read(&gl->gl_ref));
>> print_dbg(gi, " gl_state = %u\n", gl->gl_state);
>> if (gl->gl_owner_pid) {
>> - gl_owner = find_task_by_pid(gl->gl_owner_pid);
>> + gl_owner = pid_task(gl->gl_owner_pid, PIDTYPE_PID);
>> if (gl_owner)
>> print_dbg(gi, " gl_owner = pid %d (%s)\n",
>> - gl->gl_owner_pid, gl_owner->comm);
>> + pid_nr(gl->gl_owner_pid), gl_owner->comm);
>> else
>> print_dbg(gi, " gl_owner = %d (ended)\n",
>> - gl->gl_owner_pid);
>> + pid_nr(gl->gl_owner_pid));
>> } else
>> print_dbg(gi, " gl_owner = -1\n");
>> print_dbg(gi, " gl_ip = %lu\n", gl->gl_ip);
>> diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
>> index 1339996..8ad1c3f 100644
>> --- a/fs/gfs2/incore.h
>> +++ b/fs/gfs2/incore.h
>> @@ -182,7 +182,7 @@ struct gfs2_glock {
>> unsigned int gl_hash;
>> unsigned int gl_demote_state; /* state requested by remote node */
>> unsigned long gl_demote_time; /* time of first demote request */
>> - pid_t gl_owner_pid;
>> + struct pid *gl_owner_pid;
>> unsigned long gl_ip;
>> struct list_head gl_holders;
>> struct list_head gl_waiters1; /* HIF_MUTEX */
>> diff --git a/kernel/pid.c b/kernel/pid.c
>> index e4e5fc8..4776915 100644
>> --- a/kernel/pid.c
>> +++ b/kernel/pid.c
>> @@ -367,6 +367,7 @@ struct task_struct *pid_task(struct pid *pid, enum
>> pid_type type)
>> }
>> return result;
>> }
>> +EXPORT_SYMBOL(pid_task);
>>
>> /*
>> * Must be called under rcu_read_lock() or with tasklist_lock read-held.
>
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