[PATCH 4/5] Expand the INIT_SIGNALS and INIT_SIGHAND macros and remove

David Howells
2017-12-08T15:51:51Z

There doesn't seem to be any need to have the INIT_SIGNALS and INIT_SIGHAND
macros, so expand them in their single places of use and remove them.

Signed-off-by: David Howells <dhowells@redhat.com>
---

include/linux/init_task.h | 43 ++++---------------------------------------
init/init_task.c | 30 ++++++++++++++++++++++++++++--
2 files changed, 32 insertions(+), 41 deletions(-)

diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index b1385e1dca63..5b5f41328115 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -23,6 +23,9 @@

extern struct files_struct init_files;
extern struct fs_struct init_fs;
+extern struct nsproxy init_nsproxy;
+extern struct group_info init_groups;
+extern struct cred init_cred;

#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
#define INIT_PREV_CPUTIME(x) .prev_cputime = { \
@@ -33,52 +36,16 @@ extern struct fs_struct init_fs;
#endif

#ifdef CONFIG_POSIX_TIMERS
-#define INIT_POSIX_TIMERS(s) \
- .posix_timers = LIST_HEAD_INIT(s.posix_timers),
#define INIT_CPU_TIMERS(s) \
.cpu_timers = { \
LIST_HEAD_INIT(s.cpu_timers[0]), \
LIST_HEAD_INIT(s.cpu_timers[1]), \
- LIST_HEAD_INIT(s.cpu_timers[2]), \
- },
-#define INIT_CPUTIMER(s) \
- .cputimer = { \
- .cputime_atomic = INIT_CPUTIME_ATOMIC, \
- .running = false, \
- .checking_timer = false, \
+ LIST_HEAD_INIT(s.cpu_timers[2]), \
},
#else
-#define INIT_POSIX_TIMERS(s)
#define INIT_CPU_TIMERS(s)
-#define INIT_CPUTIMER(s)
#endif

-#define INIT_SIGNALS(sig) { \
- .nr_threads = 1, \
- .thread_head = LIST_HEAD_INIT(init_task.thread_node), \
- .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
- .shared_pending = { \
- .list = LIST_HEAD_INIT(sig.shared_pending.list), \
- .signal = {{0}}}, \
- INIT_POSIX_TIMERS(sig) \
- INIT_CPU_TIMERS(sig) \
- .rlim = INIT_RLIMITS, \
- INIT_CPUTIMER(sig) \
- INIT_PREV_CPUTIME(sig) \
- .cred_guard_mutex = \
- __MUTEX_INITIALIZER(sig.cred_guard_mutex), \
-}
-
-extern struct nsproxy init_nsproxy;
-
-#define INIT_SIGHAND(sighand) { \
- .count = ATOMIC_INIT(1), \
- .action = { { { .sa_handler = SIG_DFL, } }, }, \
- .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
- .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
-}
-
-extern struct group_info init_groups;

#define INIT_STRUCT_PID { \
.count = ATOMIC_INIT(1), \
@@ -103,8 +70,6 @@ extern struct group_info init_groups;
.pid = &init_struct_pid, \
}

-extern struct cred init_cred;
-
#define INIT_TASK_COMM "swapper"

/* Attach to the init_task data structure for proper alignment */
diff --git a/init/init_task.c b/init/init_task.c
index aa4030a939e5..3ac6e754cf64 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -13,8 +13,34 @@
#include <asm/pgtable.h>
#include <linux/uaccess.h>

-static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
-static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+static struct signal_struct init_signals = {
+ .nr_threads = 1,
+ .thread_head = LIST_HEAD_INIT(init_task.thread_node),
+ .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit),
+ .shared_pending = {
+ .list = LIST_HEAD_INIT(init_signals.shared_pending.list),
+ .signal = {{0}}
+ },
+ .rlim = INIT_RLIMITS,
+ .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex),
+#ifdef CONFIG_POSIX_TIMERS
+ .posix_timers = LIST_HEAD_INIT(init_signals.posix_timers),
+ .cputimer = {
+ .cputime_atomic = INIT_CPUTIME_ATOMIC,
+ .running = false,
+ .checking_timer = false,
+ },
+#endif
+ INIT_CPU_TIMERS(init_signals)
+ INIT_PREV_CPUTIME(init_signals)
+};
+
+static struct sighand_struct init_sighand = {
+ .count = ATOMIC_INIT(1),
+ .action = { { { .sa_handler = SIG_DFL, } }, },
+ .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock),
+ .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh),
+};

/*
* Set up the first task table, touch at your own risk!. Base=0,