[PATCH 1/2] HAVE_SET_RESTORE_SIGMASK

Roland McGrath
2008-03-29T03:11:46Z

Change all the #ifdef TIF_RESTORE_SIGMASK conditionals in non-arch
code to #ifdef HAVE_SET_RESTORE_SIGMASK. If arch code defines it
first, the generic set_restore_sigmask() using TIF_RESTORE_SIGMASK
is not defined.

Signed-off-by: Roland McGrath <roland@redhat.com>
---
fs/compat.c | 8 ++++----
fs/eventpoll.c | 4 ++--
fs/select.c | 8 ++++----
include/linux/sched.h | 2 +-
include/linux/thread_info.h | 10 ++++++++--
5 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/fs/compat.c b/fs/compat.c
index 9964d54..139dc93 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1634,7 +1634,7 @@ sticky:
return ret;
}

-#ifdef TIF_RESTORE_SIGMASK
+#ifdef HAVE_SET_RESTORE_SIGMASK
asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
@@ -1825,7 +1825,7 @@ sticky:

return ret;
}
-#endif /* TIF_RESTORE_SIGMASK */
+#endif /* HAVE_SET_RESTORE_SIGMASK */

#if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
/* Stuff for NFS server syscalls... */
@@ -2080,7 +2080,7 @@ long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)

#ifdef CONFIG_EPOLL

-#ifdef TIF_RESTORE_SIGMASK
+#ifdef HAVE_SET_RESTORE_SIGMASK
asmlinkage long compat_sys_epoll_pwait(int epfd,
struct compat_epoll_event __user *events,
int maxevents, int timeout,
@@ -2124,7 +2124,7 @@ asmlinkage long compat_sys_epoll_pwait(int epfd,

return err;
}
-#endif /* TIF_RESTORE_SIGMASK */
+#endif /* HAVE_SET_RESTORE_SIGMASK */

#endif /* CONFIG_EPOLL */

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 503ffa4..e55451e 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1262,7 +1262,7 @@ error_return:
return error;
}

-#ifdef TIF_RESTORE_SIGMASK
+#ifdef HAVE_SET_RESTORE_SIGMASK

/*
* Implement the event wait interface for the eventpoll file. It is the kernel
@@ -1308,7 +1308,7 @@ asmlinkage long sys_epoll_pwait(int epfd, struct epoll_event __user *events,
return error;
}

-#endif /* #ifdef TIF_RESTORE_SIGMASK */
+#endif /* HAVE_SET_RESTORE_SIGMASK */

static int __init eventpoll_init(void)
{
diff --git a/fs/select.c b/fs/select.c
index bbd351c..c06fe0b 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -425,7 +425,7 @@ sticky:
return ret;
}

-#ifdef TIF_RESTORE_SIGMASK
+#ifdef HAVE_SET_RESTORE_SIGMASK
asmlinkage long sys_pselect7(int n, fd_set __user *inp, fd_set __user *outp,
fd_set __user *exp, struct timespec __user *tsp,
const sigset_t __user *sigmask, size_t sigsetsize)
@@ -528,7 +528,7 @@ asmlinkage long sys_pselect6(int n, fd_set __user *inp, fd_set __user *outp,

return sys_pselect7(n, inp, outp, exp, tsp, up, sigsetsize);
}
-#endif /* TIF_RESTORE_SIGMASK */
+#endif /* HAVE_SET_RESTORE_SIGMASK */

struct poll_list {
struct poll_list *next;
@@ -759,7 +759,7 @@ asmlinkage long sys_poll(struct pollfd __user *ufds, unsigned int nfds,
return ret;
}

-#ifdef TIF_RESTORE_SIGMASK
+#ifdef HAVE_SET_RESTORE_SIGMASK
asmlinkage long sys_ppoll(struct pollfd __user *ufds, unsigned int nfds,
struct timespec __user *tsp, const sigset_t __user *sigmask,
size_t sigsetsize)
@@ -839,4 +839,4 @@ asmlinkage long sys_ppoll(struct pollfd __user *ufds, unsigned int nfds,

return ret;
}
-#endif /* TIF_RESTORE_SIGMASK */
+#endif /* HAVE_SET_RESTORE_SIGMASK */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 6a1e7af..6c275e8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1144,7 +1144,7 @@ struct task_struct {
struct sighand_struct *sighand;

sigset_t blocked, real_blocked;
- sigset_t saved_sigmask; /* To be restored with TIF_RESTORE_SIGMASK */
+ sigset_t saved_sigmask; /* restored if set_restore_sigmask() was used */
struct sigpending pending;

unsigned long sas_ss_sp;
diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index 4a89477..dbf5daa 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -80,7 +80,13 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
#define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
#define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)

-#ifdef TIF_RESTORE_SIGMASK
+#if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK
+/*
+ * An arch can define its own version of set_restore_sigmask() to get the
+ * job done however works, with or without TIF_RESTORE_SIGMASK.
+ */
+#define HAVE_SET_RESTORE_SIGMASK 1
+
/**
* set_restore_sigmask() - make sure saved_sigmask processing gets done
*
@@ -97,7 +103,7 @@ static inline void set_restore_sigmask(void)
set_thread_flag(TIF_RESTORE_SIGMASK);
set_thread_flag(TIF_SIGPENDING);
}
-#endif /* TIF_RESTORE_SIGMASK */
+#endif /* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */

#endif /* __KERNEL__ */