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new helper: sigsuspend()

Browse Source 
guts of saved_sigmask-based sigsuspend/rt_sigsuspend.  Takes
kernel sigset_t *.

Open-coded instances replaced with calling it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-05-21 21:42:32 -04:00
parent bf67f3a5c4
commit 68f3f16d9a
21 changed files with 50 additions and 223 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/alpha/kernel/signal.c
View File

@ -121,17 +121,8 @@ SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask)
{
sigset_t blocked;
current->saved_sigmask = current->blocked;
mask &= _BLOCKABLE;
siginitset(&blocked, mask);
set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
asmlinkage int

11
arch/arm/kernel/signal.c
View File

@ -67,17 +67,8 @@ const unsigned long syscall_restart_code[2] = {
asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, old_sigset_t mask)
{
sigset_t blocked;
current->saved_sigmask = current->blocked;
mask &= _BLOCKABLE;
siginitset(&blocked, mask);
set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
asmlinkage int

16
arch/cris/arch-v10/kernel/signal.c
View File

@ -48,19 +48,11 @@ void do_signal(int canrestart, struct pt_regs *regs);
* dummy arguments to be able to reach the regs argument. (Note that this
* arrangement relies on old_sigset_t occupying one register.)
*/
int sys_sigsuspend(old_sigset_t mask, long r11, long r12, long r13, long mof,
long srp, struct pt_regs *regs)
int sys_sigsuspend(old_sigset_t mask)
{
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
current->saved_sigmask = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
int sys_sigaction(int sig, const struct old_sigaction __user *act,

16
arch/cris/arch-v32/kernel/signal.c
View File

@ -59,19 +59,11 @@ void keep_debug_flags(unsigned long oldccs, unsigned long oldspc,
* dummy arguments to be able to reach the regs argument.
*/
int
sys_sigsuspend(old_sigset_t mask, long r11, long r12, long r13, long mof,
long srp, struct pt_regs *regs)
sys_sigsuspend(old_sigset_t mask)
{
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
current->saved_sigmask = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
int

14
arch/frv/kernel/signal.c
View File

@ -40,17 +40,9 @@ struct fdpic_func_descriptor {
*/
asmlinkage int sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
current->saved_sigmask = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
asmlinkage int sys_sigaction(int sig,

15
arch/m68k/kernel/signal.c
View File

@ -230,18 +230,9 @@ static inline void push_cache(unsigned long vaddr)
asmlinkage int
sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
{
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
current->saved_sigmask = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
asmlinkage int

20
arch/mips/kernel/signal.c
View File

@ -255,15 +255,7 @@ asmlinkage int sys_sigsuspend(nabi_no_regargs struct pt_regs regs)
uset = (sigset_t __user *) regs.regs[4];
if (copy_from_user(&newset, uset, sizeof(sigset_t)))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
current->saved_sigmask = current->blocked;
set_current_blocked(&newset);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
return sigsuspend(&newset);
}
#endif
@ -281,15 +273,7 @@ asmlinkage int sys_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
unewset = (sigset_t __user *) regs.regs[4];
if (copy_from_user(&newset, unewset, sizeof(newset)))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
current->saved_sigmask = current->blocked;
set_current_blocked(&newset);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
return sigsuspend(&newset);
}
#ifdef CONFIG_TRAD_SIGNALS

20
arch/mips/kernel/signal32.c
View File

@ -288,15 +288,7 @@ asmlinkage int sys32_sigsuspend(nabi_no_regargs struct pt_regs regs)
uset = (compat_sigset_t __user *) regs.regs[4];
if (get_sigset(&newset, uset))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
current->saved_sigmask = current->blocked;
set_current_blocked(&newset);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
return sigsuspend(&newset);
}
asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
@ -313,15 +305,7 @@ asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
uset = (compat_sigset_t __user *) regs.regs[4];
if (get_sigset(&newset, uset))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
current->saved_sigmask = current->blocked;
set_current_blocked(&newset);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
return sigsuspend(&newset);
}
SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act,

10
arch/mips/kernel/signal_n32.c
View File

@ -91,15 +91,7 @@ asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
if (copy_from_user(&uset, unewset, sizeof(uset)))
return -EFAULT;
sigset_from_compat(&newset, &uset);
sigdelsetmask(&newset, ~_BLOCKABLE);
current->saved_sigmask = current->blocked;
set_current_blocked(&newset);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
return sigsuspend(&newset);
}
asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)

14
arch/mn10300/kernel/signal.c
View File

@ -38,17 +38,9 @@
*/
asmlinkage long sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
current->saved_sigmask = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
/*

11
arch/powerpc/kernel/signal_32.c
View File

@ -244,17 +244,8 @@ static inline int restore_general_regs(struct pt_regs *regs,
long sys_sigsuspend(old_sigset_t mask)
{
sigset_t blocked;
current->saved_sigmask = current->blocked;
mask &= _BLOCKABLE;
siginitset(&blocked, mask);
set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
long sys_sigaction(int sig, struct old_sigaction __user *act,

9
arch/s390/kernel/signal.c
View File

@ -59,15 +59,8 @@ typedef struct
SYSCALL_DEFINE3(sigsuspend, int, history0, int, history1, old_sigset_t, mask)
{
sigset_t blocked;
current->saved_sigmask = current->blocked;
mask &= _BLOCKABLE;
siginitset(&blocked, mask);
set_current_blocked(&blocked);
set_current_state(TASK_INTERRUPTIBLE);
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
SYSCALL_DEFINE3(sigaction, int, sig, const struct old_sigaction __user *, act,

12
arch/sh/kernel/signal_32.c
View File

@ -58,18 +58,8 @@ sys_sigsuspend(old_sigset_t mask,
struct pt_regs __regs)
{
sigset_t blocked;
current->saved_sigmask = current->blocked;
mask &= _BLOCKABLE;
siginitset(&blocked, mask);
set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
asmlinkage int

12
arch/sparc/kernel/signal_32.c
View File

@ -64,18 +64,8 @@ struct rt_signal_frame {
static int _sigpause_common(old_sigset_t set)
{
sigset_t blocked;
current->saved_sigmask = current->blocked;
set &= _BLOCKABLE;
siginitset(&blocked, set);
set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
asmlinkage int sys_sigsuspend(old_sigset_t set)

13
arch/sparc/kernel/signal_64.c
View File

@ -242,19 +242,8 @@ struct rt_signal_frame {
static long _sigpause_common(old_sigset_t set)
{
sigset_t blocked;
current->saved_sigmask = current->blocked;
set &= _BLOCKABLE;
siginitset(&blocked, set);
set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
asmlinkage long sys_sigpause(unsigned int set)

9
arch/um/kernel/signal.c
View File

@ -152,15 +152,8 @@ int do_signal(void)
long sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
sigset_t blocked;
mask &= _BLOCKABLE;
siginitset(&blocked, mask);
set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)

12
arch/x86/ia32/ia32_signal.c
View File

@ -127,18 +127,8 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
asmlinkage long sys32_sigsuspend(int history0, int history1, old_sigset_t mask)
{
sigset_t blocked;
current->saved_sigmask = current->blocked;
mask &= _BLOCKABLE;
siginitset(&blocked, mask);
set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
asmlinkage long sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,

12
arch/x86/kernel/signal.c
View File

@ -478,18 +478,8 @@ asmlinkage int
sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
sigset_t blocked;
current->saved_sigmask = current->blocked;
mask &= _BLOCKABLE;
siginitset(&blocked, mask);
set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
return sigsuspend(&blocked);
}
asmlinkage int

1
include/linux/signal.h
View File

@ -252,6 +252,7 @@ extern int do_sigtimedwait(const sigset_t *, siginfo_t *,
extern int sigprocmask(int, sigset_t *, sigset_t *);
extern void set_current_blocked(const sigset_t *);
extern int show_unhandled_signals;
extern int sigsuspend(sigset_t *);
extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie);
extern void block_sigmask(struct k_sigaction *ka, int signr);

10
kernel/compat.c
View File

@ -1073,15 +1073,7 @@ asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat
if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t)))
return -EFAULT;
sigset_from_compat(&newset, &newset32);
sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP));
current->saved_sigmask = current->blocked;
set_current_blocked(&newset);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
return sigsuspend(&newset);
}
#endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */

25
kernel/signal.c
View File

@ -3236,6 +3236,21 @@ SYSCALL_DEFINE0(pause)
#endif
#ifdef HAVE_SET_RESTORE_SIGMASK
int sigsuspend(sigset_t *set)
{
sigdelsetmask(set, sigmask(SIGKILL)|sigmask(SIGSTOP));
current->saved_sigmask = current->blocked;
set_current_blocked(set);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
}
#endif
#ifdef __ARCH_WANT_SYS_RT_SIGSUSPEND
/**
* sys_rt_sigsuspend - replace the signal mask for a value with the
@ -3253,15 +3268,7 @@ SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *, unewset, size_t, sigsetsize)
if (copy_from_user(&newset, unewset, sizeof(newset)))
return -EFAULT;
sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP));
current->saved_sigmask = current->blocked;
set_current_blocked(&newset);
current->state = TASK_INTERRUPTIBLE;
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;
return sigsuspend(&newset);
}
#endif /* __ARCH_WANT_SYS_RT_SIGSUSPEND */