Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc

Pull arch signal handling cleanup from Richard Weinberger:
 "This patch series moves all remaining archs to the get_signal(),
  signal_setup_done() and sigsp() functions.

  Currently these archs use open coded variants of the said functions.
  Further, unused parameters get removed from get_signal_to_deliver(),
  tracehook_signal_handler() and signal_delivered().

  At the end of the day we save around 500 lines of code."

* 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits)
  powerpc: Use sigsp()
  openrisc: Use sigsp()
  mn10300: Use sigsp()
  mips: Use sigsp()
  microblaze: Use sigsp()
  metag: Use sigsp()
  m68k: Use sigsp()
  m32r: Use sigsp()
  hexagon: Use sigsp()
  frv: Use sigsp()
  cris: Use sigsp()
  c6x: Use sigsp()
  blackfin: Use sigsp()
  avr32: Use sigsp()
  arm64: Use sigsp()
  arc: Use sigsp()
  sas_ss_flags: Remove nested ternary if
  Rip out get_signal_to_deliver()
  Clean up signal_delivered()
  tracehook_signal_handler: Remove sig, info, ka and regs
  ...

1 files changed, 9 insertions, 15 deletions

diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
index c5ee208321c3..1b9ad02837cf 100644
--- a/arch/arm64/kernel/signal32.c
+++ b/arch/arm64/kernel/signal32.c
@@ -407,20 +407,14 @@ badframe:
 	return 0;
 }
 
-static void __user *compat_get_sigframe(struct k_sigaction *ka,
+static void __user *compat_get_sigframe(struct ksignal *ksig,
 					struct pt_regs *regs,
 					int framesize)
 {
-	compat_ulong_t sp = regs->compat_sp;
+	compat_ulong_t sp = sigsp(regs->compat_sp, ksig);
 	void __user *frame;
 
 	/*
-	 * This is the X/Open sanctioned signal stack switching.
-	 */
-	if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
-		sp = current->sas_ss_sp + current->sas_ss_size;
-
-	/*
 	 * ATPCS B01 mandates 8-byte alignment
 	 */
 	frame = compat_ptr((compat_uptr_t)((sp - framesize) & ~7));
@@ -520,18 +514,18 @@ static int compat_setup_sigframe(struct compat_sigframe __user *sf,
 /*
  * 32-bit signal handling routines called from signal.c
  */
-int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
+int compat_setup_rt_frame(int usig, struct ksignal *ksig,
 			  sigset_t *set, struct pt_regs *regs)
 {
 	struct compat_rt_sigframe __user *frame;
 	int err = 0;
 
-	frame = compat_get_sigframe(ka, regs, sizeof(*frame));
+	frame = compat_get_sigframe(ksig, regs, sizeof(*frame));
 
 	if (!frame)
 		return 1;
 
-	err |= copy_siginfo_to_user32(&frame->info, info);
+	err |= copy_siginfo_to_user32(&frame->info, &ksig->info);
 
 	__put_user_error(0, &frame->sig.uc.uc_flags, err);
 	__put_user_error(0, &frame->sig.uc.uc_link, err);
@@ -541,7 +535,7 @@ int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	err |= compat_setup_sigframe(&frame->sig, regs, set);
 
 	if (err == 0) {
-		compat_setup_return(regs, ka, frame->sig.retcode, frame, usig);
+		compat_setup_return(regs, &ksig->ka, frame->sig.retcode, frame, usig);
 		regs->regs[1] = (compat_ulong_t)(unsigned long)&frame->info;
 		regs->regs[2] = (compat_ulong_t)(unsigned long)&frame->sig.uc;
 	}
@@ -549,13 +543,13 @@ int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	return err;
 }
 
-int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set,
+int compat_setup_frame(int usig, struct ksignal *ksig, sigset_t *set,
 		       struct pt_regs *regs)
 {
 	struct compat_sigframe __user *frame;
 	int err = 0;
 
-	frame = compat_get_sigframe(ka, regs, sizeof(*frame));
+	frame = compat_get_sigframe(ksig, regs, sizeof(*frame));
 
 	if (!frame)
 		return 1;
@@ -564,7 +558,7 @@ int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set,
 
 	err |= compat_setup_sigframe(frame, regs, set);
 	if (err == 0)
-		compat_setup_return(regs, ka, frame->retcode, frame, usig);
+		compat_setup_return(regs, &ksig->ka, frame->retcode, frame, usig);
 
 	return err;
 }