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| author | Chris Metcalf | 2012-10-23 19:30:54 +0200 |
|---|---|---|
| committer | Al Viro | 2012-10-23 22:23:58 +0200 |
| commit | 6b14e4198c729b748a7f6d22059e6a101d2b241a (patch) | |
| tree | 77668782763f74aec995899e919231e81a71d56a /arch/tile/mm | |
| parent | tile: switch to generic sys_execve() (diff) | |
| download | kernel-qcow2-linux-6b14e4198c729b748a7f6d22059e6a101d2b241a.tar.gz kernel-qcow2-linux-6b14e4198c729b748a7f6d22059e6a101d2b241a.tar.xz kernel-qcow2-linux-6b14e4198c729b748a7f6d22059e6a101d2b241a.zip | |
arch/tile: eliminate pt_regs trampolines for syscalls
Using the new current_pt_regs() model, we can remove some trampolines
from assembly code and call directly to the C syscall implementations.
rt_sigreturn() and clone() still need some assembly wrapping, but no
longer are passed a pt_regs pointer. sigaltstack() and the
tilepro-specific cmpxchg_badaddr() syscalls are now just straight C.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/mm')
| -rw-r--r-- | arch/tile/mm/fault.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c index fe811fa5f1b9..3d2b81c163a6 100644 --- a/arch/tile/mm/fault.c +++ b/arch/tile/mm/fault.c @@ -70,9 +70,10 @@ static noinline void force_sig_info_fault(const char *type, int si_signo, * Synthesize the fault a PL0 process would get by doing a word-load of * an unaligned address or a high kernel address. */ -SYSCALL_DEFINE2(cmpxchg_badaddr, unsigned long, address, - struct pt_regs *, regs) +SYSCALL_DEFINE1(cmpxchg_badaddr, unsigned long, address) { + struct pt_regs *regs = current_pt_regs(); + if (address >= PAGE_OFFSET) force_sig_info_fault("atomic segfault", SIGSEGV, SEGV_MAPERR, address, INT_DTLB_MISS, current, regs); |