[PATCH -next] kdb: Use newer api for tasklist scanning

[Davidlohr Bueso]

This kills the custom kdb_do_each_thread/kdb_while_each_thread
calls used in kdb to iterate through all tasks. It is obsolete
and racy to use tsk->thread_group, although in this particular
case there is no concurrency so it doesn't matter. Still, lets
trivially replace it for the newer one, maintaining semantics,
of course.

Signed-off-by: Davidlohr Bueso <dbu...@suse.de>
---
 kernel/debug/kdb/kdb_bt.c      | 4 ++--
 kernel/debug/kdb/kdb_main.c    | 8 ++++----
 kernel/debug/kdb/kdb_private.h | 4 ----
 3 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/kernel/debug/kdb/kdb_bt.c b/kernel/debug/kdb/kdb_bt.c
index 18e03aba2cfc..1f9f0e47aeda 100644
--- a/kernel/debug/kdb/kdb_bt.c
+++ b/kernel/debug/kdb/kdb_bt.c
@@ -149,14 +149,14 @@ kdb_bt(int argc, const char **argv)
                                return 0;
                }
                /* Now the inactive tasks */
-               kdb_do_each_thread(g, p) {
+               for_each_process_thread(g, p) {
                        if (KDB_FLAG(CMD_INTERRUPT))
                                return 0;
                        if (task_curr(p))
                                continue;
                        if (kdb_bt1(p, mask, btaprompt))
                                return 0;
-               } kdb_while_each_thread(g, p);
+               }
        } else if (strcmp(argv[0], "btp") == 0) {
                struct task_struct *p;
                unsigned long pid;
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index 5c7949061671..930ac1b25ec7 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -2299,10 +2299,10 @@ void kdb_ps_suppressed(void)
                if (kdb_task_state(p, mask_I))
                        ++idle;
        }
-       kdb_do_each_thread(g, p) {
+       for_each_process_thread(g, p) {
                if (kdb_task_state(p, mask_M))
                        ++daemon;
-       } kdb_while_each_thread(g, p);
+       }
        if (idle || daemon) {
                if (idle)
                        kdb_printf("%d idle process%s (state I)%s\n",
@@ -2370,12 +2370,12 @@ static int kdb_ps(int argc, const char **argv)
        }
        kdb_printf("\n");
        /* Now the real tasks */
-       kdb_do_each_thread(g, p) {
+       for_each_process_thread(g, p) {
                if (KDB_FLAG(CMD_INTERRUPT))
                        return 0;
                if (kdb_task_state(p, mask))
                        kdb_ps1(p);
-       } kdb_while_each_thread(g, p);
+       }
 
        return 0;
 }
diff --git a/kernel/debug/kdb/kdb_private.h b/kernel/debug/kdb/kdb_private.h
index 2e296e4a234c..a4281fb99299 100644
--- a/kernel/debug/kdb/kdb_private.h
+++ b/kernel/debug/kdb/kdb_private.h
@@ -230,10 +230,6 @@ extern struct task_struct *kdb_curr_task(int);
 
 #define kdb_task_has_cpu(p) (task_curr(p))
 
-/* Simplify coexistence with NPTL */
-#define        kdb_do_each_thread(g, p) do_each_thread(g, p)
-#define        kdb_while_each_thread(g, p) while_each_thread(g, p)
-
 #define GFP_KDB (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL)
 
 extern void *debug_kmalloc(size_t size, gfp_t flags);
-- 
2.26.2