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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-05-04 09:46:04 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-05-16 14:42:40 +0200 |
| commit | c15787a7c3f702c4240708fb8e63abce1bfe1136 (patch) | |
| tree | 55d861db36b6b4b185bfb950e96e3132ed1b7d12 /arch/s390/kernel/compat_signal.c | |
| parent | s390/hugepages: clear page table for sw large page emulation (diff) | |
| download | linux-dev-c15787a7c3f702c4240708fb8e63abce1bfe1136.tar.xz linux-dev-c15787a7c3f702c4240708fb8e63abce1bfe1136.zip | |
s390: remove dead code from signal handler
The code in entry[64].S calls do_signal only on return to user space.
user_mode(regs) is true for every calls to do_signal, it is unnecessary
to recheck user_mode at the start of do_signal and the legacy signal
stack switching path in get_sigframe is never reached.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/compat_signal.c')
| -rw-r--r-- | arch/s390/kernel/compat_signal.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c index 28040fd5e8a2..377c096ca4a7 100644 --- a/arch/s390/kernel/compat_signal.c +++ b/arch/s390/kernel/compat_signal.c @@ -437,13 +437,6 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size) sp = current->sas_ss_sp + current->sas_ss_size; } - /* This is the legacy signal stack switching. */ - else if (!user_mode(regs) && - !(ka->sa.sa_flags & SA_RESTORER) && - ka->sa.sa_restorer) { - sp = (unsigned long) ka->sa.sa_restorer; - } - return (void __user *)((sp - frame_size) & -8ul); } |