bfin: switch to generic vfork, get rid of pointless wrappers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

5 files changed, 7 insertions, 54 deletions

diff --git a/arch/blackfin/include/asm/unistd.h b/arch/blackfin/include/asm/unistd.h
index b4ec1bb3d5d4..460514a1a4e1 100644
--- a/arch/blackfin/include/asm/unistd.h
+++ b/arch/blackfin/include/asm/unistd.h
@@ -447,6 +447,7 @@
 #define __ARCH_WANT_SYS_RT_SIGACTION
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
 #define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_VFORK
 
 /*
  * "Conditional" syscalls
diff --git a/arch/blackfin/kernel/entry.S b/arch/blackfin/kernel/entry.S
index 78f4f637e155..4071265fc4fe 100644
--- a/arch/blackfin/kernel/entry.S
+++ b/arch/blackfin/kernel/entry.S
@@ -57,36 +57,3 @@ ENTRY(_ret_from_fork)
         RESTORE_CONTEXT
         rti;
 ENDPROC(_ret_from_fork)
-
-ENTRY(_sys_vfork)
-        r0 = sp;
-        r0 += 24;
-        [--sp] = rets;
-        SP += -12;
-        pseudo_long_call _bfin_vfork, p2;
-        SP += 12;
-        rets = [sp++];
-        rts;
-ENDPROC(_sys_vfork)
-
-ENTRY(_sys_clone)
-        r0 = sp;
-        r0 += 24;
-        [--sp] = rets;
-        SP += -12;
-        pseudo_long_call _bfin_clone, p2;
-        SP += 12;
-        rets = [sp++];
-        rts;
-ENDPROC(_sys_clone)
-
-ENTRY(_sys_rt_sigreturn)
-        r0 = sp;
-        r0 += 24;
-        [--sp] = rets;
-        SP += -12;
-        pseudo_long_call _do_rt_sigreturn, p2;
-        SP += 12;
-        rets = [sp++];
-        rts;
-ENDPROC(_sys_rt_sigreturn)
diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index da8df0e504ac..e5ae8fcab438 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -127,28 +127,13 @@ void flush_thread(void)
 {
 }
 
-asmlinkage int bfin_vfork(struct pt_regs *regs)
+asmlinkage int bfin_clone(unsigned long clone_flags, unsigned long newsp)
 {
-        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL,
-                       NULL);
-}
-
-asmlinkage int bfin_clone(struct pt_regs *regs)
-{
-        unsigned long clone_flags;
-        unsigned long newsp;
-
 #ifdef __ARCH_SYNC_CORE_DCACHE
         if (current->nr_cpus_allowed == num_possible_cpus())
                 set_cpus_allowed_ptr(current, cpumask_of(smp_processor_id()));
 #endif
-
-        /* syscall2 puts clone_flags in r0 and usp in r1 */
-        clone_flags = regs->r0;
-        newsp = regs->r1;
-        if (!newsp)
-                newsp = rdusp();
-        else
+        if (newsp)
                 newsp -= 12;
         return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
 }
@@ -174,7 +159,7 @@ copy_thread(unsigned long clone_flags,
         } else {
                 *childregs = *regs;
                 childregs->r0 = 0;
-                p->thread.usp = usp;
+                p->thread.usp = usp ? : rdusp();
                 v[0] = v[1] = 0;
         }
 
diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c
index 6ed20a1a4af9..84b4be05840c 100644
--- a/arch/blackfin/kernel/signal.c
+++ b/arch/blackfin/kernel/signal.c
@@ -82,9 +82,9 @@ rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *p
         return err;
 }
 
-asmlinkage int do_rt_sigreturn(unsigned long __unused)
+asmlinkage int sys_rt_sigreturn(void)
 {
-        struct pt_regs *regs = (struct pt_regs *)__unused;
+        struct pt_regs *regs = current_pt_regs();
         unsigned long usp = rdusp();
         struct rt_sigframe *frame = (struct rt_sigframe *)(usp);
         sigset_t set;
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index 4a38c68e2dde..86b5a095c5a1 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -1431,7 +1431,7 @@ ENTRY(_sys_call_table)
         .long _sys_ni_syscall   /* old sys_ipc */
         .long _sys_fsync
         .long _sys_ni_syscall   /* old sys_sigreturn */
-        .long _sys_clone                /* 120 */
+        .long _bfin_clone               /* 120 */
         .long _sys_setdomainname
         .long _sys_newuname
         .long _sys_ni_syscall   /* old sys_modify_ldt */