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authorMatt Fleming <matt.fleming@intel.com>2012-03-28 15:16:32 -0700
committerPaul Mundt <lethal@linux-sh.org>2012-03-29 09:11:26 +0900
commit5e047fa159cf40733c627002d0443fddff3183c7 (patch)
tree0e2044faec870879572a2df0cdf67456f23eb7aa /arch
parent8368b0e0ca5f38f605066fa0c9ea33bbc191e267 (diff)
downloadop-kernel-dev-5e047fa159cf40733c627002d0443fddff3183c7.zip
op-kernel-dev-5e047fa159cf40733c627002d0443fddff3183c7.tar.gz
sh: use set_current_blocked() and block_sigmask()
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/kernel/signal_32.c32
-rw-r--r--arch/sh/kernel/signal_64.c37
2 files changed, 20 insertions, 49 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 1055146..883d711 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -58,12 +58,13 @@ sys_sigsuspend(old_sigset_t mask,
unsigned long r5, unsigned long r6, unsigned long r7,
struct pt_regs __regs)
{
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
+ sigset_t blocked;
+
current->saved_sigmask = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+
+ mask &= _BLOCKABLE;
+ siginitset(&blocked, mask);
+ set_current_blocked(&blocked);
current->state = TASK_INTERRUPTIBLE;
schedule();
@@ -240,11 +241,7 @@ asmlinkage int sys_sigreturn(unsigned long r4, unsigned long r5,
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
-
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->sc, &r0))
goto badframe;
@@ -274,10 +271,7 @@ asmlinkage int sys_rt_sigreturn(unsigned long r4, unsigned long r5,
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
goto badframe;
@@ -548,14 +542,8 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
else
ret = setup_frame(sig, ka, oldset, regs);
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
+ if (ret == 0)
+ block_sigmask(ka, sig);
return ret;
}
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index 7b9278d..3c9a6f7 100644
--- a/arch/sh/kernel/signal_64.c
+++ b/arch/sh/kernel/signal_64.c
@@ -159,14 +159,13 @@ sys_sigsuspend(old_sigset_t mask,
unsigned long r6, unsigned long r7,
struct pt_regs * regs)
{
- sigset_t saveset;
+ sigset_t saveset, blocked;
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+
+ mask &= _BLOCKABLE;
+ siginitset(&blocked, mask);
+ set_current_blocked(&blocked);
REF_REG_RET = -EINTR;
while (1) {
@@ -198,11 +197,8 @@ sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
if (copy_from_user(&newset, unewset, sizeof(newset)))
return -EFAULT;
sigdelsetmask(&newset, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
saveset = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&newset);
REF_REG_RET = -EINTR;
while (1) {
@@ -408,11 +404,7 @@ asmlinkage int sys_sigreturn(unsigned long r2, unsigned long r3,
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
-
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->sc, &ret))
goto badframe;
@@ -445,10 +437,7 @@ asmlinkage int sys_rt_sigreturn(unsigned long r2, unsigned long r3,
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ret))
goto badframe;
@@ -734,14 +723,8 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
else
ret = setup_frame(sig, ka, oldset, regs);
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
+ if (ret == 0)
+ block_sigmask(ka, sig);
return ret;
}
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