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FROMLIST: binder: remove binder_debug_no_lock mechanism

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(from https://patchwork.kernel.org/patch/9817811/)

With the global lock, there was a mechanism to access
binder driver debugging information with the global
lock disabled to debug deadlocks or other issues.
This mechanism is rarely (if ever) used anymore
and wasn't needed during the development of
fine-grained locking in the binder driver.
Removing it.

Change-Id: I6f4061ddb04fbdcf1e067e7a5eeee730f14d4c01
Signed-off-by: Todd Kjos <tkjos@google.com>
This commit is contained in:
Todd Kjos
2017-05-24 11:53:13 -07:00
parent b934102cba
commit 48b332119e
1 changed files with 8 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/android/binder.c
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@@ -106,9 +106,6 @@ static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
static bool binder_debug_no_lock;
module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
static char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES;
module_param_named(devices, binder_devices_param, charp, S_IRUGO);
@@ -3507,10 +3504,8 @@ static int binder_state_show(struct seq_file *m, void *unused)
{
struct binder_proc *proc;
struct binder_node *node;
int do_lock = !binder_debug_no_lock;
if (do_lock)
binder_lock(__func__);
binder_lock(__func__);
seq_puts(m, "binder state:\n");
@@ -3521,18 +3516,15 @@ static int binder_state_show(struct seq_file *m, void *unused)
hlist_for_each_entry(proc, &binder_procs, proc_node)
print_binder_proc(m, proc, 1);
if (do_lock)
binder_unlock(__func__);
binder_unlock(__func__);
return 0;
}
static int binder_stats_show(struct seq_file *m, void *unused)
{
struct binder_proc *proc;
int do_lock = !binder_debug_no_lock;
if (do_lock)
binder_lock(__func__);
binder_lock(__func__);
seq_puts(m, "binder stats:\n");
@@ -3540,24 +3532,20 @@ static int binder_stats_show(struct seq_file *m, void *unused)
hlist_for_each_entry(proc, &binder_procs, proc_node)
print_binder_proc_stats(m, proc);
if (do_lock)
binder_unlock(__func__);
binder_unlock(__func__);
return 0;
}
static int binder_transactions_show(struct seq_file *m, void *unused)
{
struct binder_proc *proc;
int do_lock = !binder_debug_no_lock;
if (do_lock)
binder_lock(__func__);
binder_lock(__func__);
seq_puts(m, "binder transactions:\n");
hlist_for_each_entry(proc, &binder_procs, proc_node)
print_binder_proc(m, proc, 0);
if (do_lock)
binder_unlock(__func__);
binder_unlock(__func__);
return 0;
}
@@ -3565,10 +3553,8 @@ static int binder_proc_show(struct seq_file *m, void *unused)
{
struct binder_proc *itr;
int pid = (unsigned long)m->private;
int do_lock = !binder_debug_no_lock;
if (do_lock)
binder_lock(__func__);
binder_lock(__func__);
hlist_for_each_entry(itr, &binder_procs, proc_node) {
if (itr->pid == pid) {
@@ -3576,8 +3562,7 @@ static int binder_proc_show(struct seq_file *m, void *unused)
print_binder_proc(m, itr, 1);
}
}
if (do_lock)
binder_unlock(__func__);
binder_unlock(__func__);
return 0;
}