Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6

13 files changed, 97 insertions, 86 deletions

diff --git a/arch/sparc/kernel/systbls.S b/arch/sparc/kernel/systbls.S
index 928ffeb0fabb..025f4516e651 100644
--- a/arch/sparc/kernel/systbls.S
+++ b/arch/sparc/kernel/systbls.S
@@ -57,11 +57,11 @@ sys_call_table:
 /*180*/	.long sys_flistxattr, sys_removexattr, sys_lremovexattr, sys_sigpending, sys_ni_syscall
 /*185*/	.long sys_setpgid, sys_fremovexattr, sys_tkill, sys_exit_group, sys_newuname
 /*190*/	.long sys_init_module, sys_personality, sparc_remap_file_pages, sys_epoll_create, sys_epoll_ctl
-/*195*/	.long sys_epoll_wait, sys_nis_syscall, sys_getppid, sparc_sigaction, sys_sgetmask
+/*195*/	.long sys_epoll_wait, sys_ioprio_set, sys_getppid, sparc_sigaction, sys_sgetmask
 /*200*/	.long sys_ssetmask, sys_sigsuspend, sys_newlstat, sys_uselib, old_readdir
 /*205*/	.long sys_readahead, sys_socketcall, sys_syslog, sys_lookup_dcookie, sys_fadvise64
 /*210*/	.long sys_fadvise64_64, sys_tgkill, sys_waitpid, sys_swapoff, sys_sysinfo
-/*215*/	.long sys_ipc, sys_sigreturn, sys_clone, sys_nis_syscall, sys_adjtimex
+/*215*/	.long sys_ipc, sys_sigreturn, sys_clone, sys_ioprio_get, sys_adjtimex
 /*220*/	.long sys_sigprocmask, sys_ni_syscall, sys_delete_module, sys_ni_syscall, sys_getpgid
 /*225*/	.long sys_bdflush, sys_sysfs, sys_nis_syscall, sys_setfsuid16, sys_setfsgid16
 /*230*/	.long sys_select, sys_time, sys_nis_syscall, sys_stime, sys_statfs64
diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 4b1329286242..6a4733683f0f 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -43,6 +43,23 @@ config SPARC64_PAGE_SIZE_4MB
 
 endchoice
 
+config SECCOMP
+	bool "Enable seccomp to safely compute untrusted bytecode"
+	depends on PROC_FS
+	default y
+	help
+	  This kernel feature is useful for number crunching applications
+	  that may need to compute untrusted bytecode during their
+	  execution. By using pipes or other transports made available to
+	  the process as file descriptors supporting the read/write
+	  syscalls, it's possible to isolate those applications in
+	  their own address space using seccomp. Once seccomp is
+	  enabled via /proc/<pid>/seccomp, it cannot be disabled
+	  and the task is only allowed to execute a few safe syscalls
+	  defined by each seccomp mode.
+
+	  If unsure, say Y. Only embedded should say N here.
+
 source kernel/Kconfig.hz
 
 source "init/Kconfig"
diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S
index d3973d8a7195..d781f10adc52 100644
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -22,8 +22,6 @@
 #include <asm/estate.h>
 #include <asm/auxio.h>
 
-/* #define SYSCALL_TRACING	1 */
-
 #define curptr      g6
 
 #define NR_SYSCALLS 284      /* Each OS is different... */
@@ -1554,11 +1552,12 @@ sys_ptrace:	add		%sp, PTREGS_OFF, %o0
 		nop
 		.align		32
 1:		ldx		[%curptr + TI_FLAGS], %l5
-		andcc		%l5, _TIF_SYSCALL_TRACE, %g0
+		andcc		%l5, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
 		be,pt		%icc, rtrap
 		 clr		%l6
+		add		%sp, PTREGS_OFF, %o0
 		call		syscall_trace
-		 nop
+		 mov		1, %o1
 
 		ba,pt		%xcc, rtrap
 		 clr		%l6
@@ -1642,18 +1641,20 @@ linux_sparc_ni_syscall:
 	 or		%l7, %lo(sys_ni_syscall), %l7
 
 linux_syscall_trace32:
+	add		%sp, PTREGS_OFF, %o0
 	call		syscall_trace
-	 nop
+	 clr		%o1
 	srl		%i0, 0, %o0
-	mov		%i4, %o4
+	srl		%i4, 0, %o4
 	srl		%i1, 0, %o1
 	srl		%i2, 0, %o2
 	b,pt		%xcc, 2f
 	 srl		%i3, 0, %o3
 
 linux_syscall_trace:
+	add		%sp, PTREGS_OFF, %o0
 	call		syscall_trace
-	 nop
+	 clr		%o1
 	mov		%i0, %o0
 	mov		%i1, %o1
 	mov		%i2, %o2
@@ -1671,11 +1672,6 @@ linux_sparc_syscall32:
 	bgeu,pn		%xcc, linux_sparc_ni_syscall		! CTI
 	 srl		%i0, 0, %o0				! IEU0
 	sll		%g1, 2, %l4				! IEU0	Group
-#ifdef SYSCALL_TRACING
-	call		syscall_trace_entry
-	 add		%sp, PTREGS_OFF, %o0
-	srl		%i0, 0, %o0
-#endif
 	srl		%i4, 0, %o4				! IEU1
 	lduw		[%l7 + %l4], %l7			! Load
 	srl		%i1, 0, %o1				! IEU0	Group
@@ -1683,7 +1679,7 @@ linux_sparc_syscall32:
 
 	srl		%i5, 0, %o5				! IEU1
 	srl		%i2, 0, %o2				! IEU0	Group
-	andcc		%l0, _TIF_SYSCALL_TRACE, %g0		! IEU0	Group
+	andcc		%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
 	bne,pn		%icc, linux_syscall_trace32		! CTI
 	 mov		%i0, %l5				! IEU1
 	call		%l7					! CTI	Group brk forced
@@ -1699,11 +1695,6 @@ linux_sparc_syscall:
 	bgeu,pn		%xcc, linux_sparc_ni_syscall		! CTI
 	 mov		%i0, %o0				! IEU0
 	sll		%g1, 2, %l4				! IEU0	Group
-#ifdef SYSCALL_TRACING
-	call		syscall_trace_entry
-	 add		%sp, PTREGS_OFF, %o0
-	mov		%i0, %o0
-#endif
 	mov		%i1, %o1				! IEU1
 	lduw		[%l7 + %l4], %l7			! Load
 4:	mov		%i2, %o2				! IEU0	Group
@@ -1711,7 +1702,7 @@ linux_sparc_syscall:
 
 	mov		%i3, %o3				! IEU1
 	mov		%i4, %o4				! IEU0	Group
-	andcc		%l0, _TIF_SYSCALL_TRACE, %g0		! IEU1	Group+1 bubble
+	andcc		%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %g0
 	bne,pn		%icc, linux_syscall_trace		! CTI	Group
 	 mov		%i0, %l5				! IEU0
 2:	call		%l7					! CTI	Group brk forced
@@ -1720,12 +1711,6 @@ linux_sparc_syscall:
 
 3:	stx		%o0, [%sp + PTREGS_OFF + PT_V9_I0]
 ret_sys_call:
-#ifdef SYSCALL_TRACING
-	mov		%o0, %o1
-	call		syscall_trace_exit
-	 add		%sp, PTREGS_OFF, %o0
-	mov		%o1, %o0
-#endif
 	ldx		[%sp + PTREGS_OFF + PT_V9_TSTATE], %g3
 	ldx		[%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
 	sra		%o0, 0, %o0
@@ -1745,7 +1730,7 @@ ret_sys_call:
 1:
 	cmp		%o0, -ERESTART_RESTARTBLOCK
 	bgeu,pn		%xcc, 1f
-	 andcc		%l0, _TIF_SYSCALL_TRACE, %l6	
+	 andcc		%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %l6
 80:
 	/* System call success, clear Carry condition code. */
 	andn		%g3, %g2, %g3
@@ -1760,7 +1745,7 @@ ret_sys_call:
 	/* System call failure, set Carry condition code.
 	 * Also, get abs(errno) to return to the process.
 	 */
-	andcc		%l0, _TIF_SYSCALL_TRACE, %l6	
+	andcc		%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT), %l6	
 	sub		%g0, %o0, %o0
 	or		%g3, %g2, %g3
 	stx		%o0, [%sp + PTREGS_OFF + PT_V9_I0]
@@ -1773,8 +1758,9 @@ ret_sys_call:
 	b,pt		%xcc, rtrap
 	 stx		%l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
 linux_syscall_trace2:
+	add		%sp, PTREGS_OFF, %o0
 	call		syscall_trace
-	 nop
+	 mov		1, %o1
 	stx		%l1, [%sp + PTREGS_OFF + PT_V9_TPC]
 	ba,pt		%xcc, rtrap
 	 stx		%l2, [%sp + PTREGS_OFF + PT_V9_TNPC]
diff --git a/arch/sparc64/kernel/power.c b/arch/sparc64/kernel/power.c
index 52f14e399b1c..533104c7907d 100644
--- a/arch/sparc64/kernel/power.c
+++ b/arch/sparc64/kernel/power.c
@@ -4,6 +4,8 @@
  * Copyright (C) 1999 David S. Miller (davem@redhat.com)
  */
 
+#define __KERNEL_SYSCALLS__
+
 #include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -17,7 +19,6 @@
 #include <asm/ebus.h>
 #include <asm/auxio.h>
 
-#define __KERNEL_SYSCALLS__
 #include <linux/unistd.h>
 
 /*
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c
index 80a76e2ad732..23ad839d113f 100644
--- a/arch/sparc64/kernel/ptrace.c
+++ b/arch/sparc64/kernel/ptrace.c
@@ -19,6 +19,8 @@
 #include <linux/smp.h>
 #include <linux/smp_lock.h>
 #include <linux/security.h>
+#include <linux/seccomp.h>
+#include <linux/audit.h>
 #include <linux/signal.h>
 
 #include <asm/asi.h>
@@ -628,15 +630,27 @@ out:
 	unlock_kernel();
 }
 
-asmlinkage void syscall_trace(void)
+asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p)
 {
-#ifdef DEBUG_PTRACE
-	printk("%s [%d]: syscall_trace\n", current->comm, current->pid);
-#endif
-	if (!test_thread_flag(TIF_SYSCALL_TRACE))
-		return;
+	/* do the secure computing check first */
+	secure_computing(regs->u_regs[UREG_G1]);
+
+	if (unlikely(current->audit_context) && syscall_exit_p) {
+		unsigned long tstate = regs->tstate;
+		int result = AUDITSC_SUCCESS;
+
+		if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY)))
+			result = AUDITSC_FAILURE;
+
+		audit_syscall_exit(current, result, regs->u_regs[UREG_I0]);
+	}
+
 	if (!(current->ptrace & PT_PTRACED))
-		return;
+		goto out;
+
+	if (!test_thread_flag(TIF_SYSCALL_TRACE))
+		goto out;
+
 	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
 				 ? 0x80 : 0));
 
@@ -645,12 +659,20 @@ asmlinkage void syscall_trace(void)
 	 * for normal use.  strace only continues with a signal if the
 	 * stopping signal is not SIGTRAP.  -brl
 	 */
-#ifdef DEBUG_PTRACE
-	printk("%s [%d]: syscall_trace exit= %x\n", current->comm,
-		current->pid, current->exit_code);
-#endif
 	if (current->exit_code) {
-		send_sig (current->exit_code, current, 1);
+		send_sig(current->exit_code, current, 1);
 		current->exit_code = 0;
 	}
+
+out:
+	if (unlikely(current->audit_context) && !syscall_exit_p)
+		audit_syscall_entry(current,
+				    (test_thread_flag(TIF_32BIT) ?
+				     AUDIT_ARCH_SPARC :
+				     AUDIT_ARCH_SPARC64),
+				    regs->u_regs[UREG_G1],
+				    regs->u_regs[UREG_I0],
+				    regs->u_regs[UREG_I1],
+				    regs->u_regs[UREG_I2],
+				    regs->u_regs[UREG_I3]);
 }
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index e5b9c7a27789..441fc2e52ce6 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -45,8 +45,8 @@ extern void calibrate_delay(void);
 /* Please don't make this stuff initdata!!!  --DaveM */
 static unsigned char boot_cpu_id;
 
-cpumask_t cpu_online_map = CPU_MASK_NONE;
-cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
+cpumask_t cpu_online_map = CPU_MASK_NONE __read_mostly;
+cpumask_t phys_cpu_present_map = CPU_MASK_NONE __read_mostly;
 static cpumask_t smp_commenced_mask;
 static cpumask_t cpu_callout_map;
 
@@ -155,7 +155,7 @@ void cpu_panic(void)
 	panic("SMP bolixed\n");
 }
 
-static unsigned long current_tick_offset;
+static unsigned long current_tick_offset __read_mostly;
 
 /* This tick register synchronization scheme is taken entirely from
  * the ia64 port, see arch/ia64/kernel/smpboot.c for details and credit.
@@ -1193,8 +1193,8 @@ void smp_send_stop(void)
 {
 }
 
-unsigned long __per_cpu_base;
-unsigned long __per_cpu_shift;
+unsigned long __per_cpu_base __read_mostly;
+unsigned long __per_cpu_shift __read_mostly;
 
 EXPORT_SYMBOL(__per_cpu_base);
 EXPORT_SYMBOL(__per_cpu_shift);
diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c
index 56cd96f4a5cd..9202d925a9ce 100644
--- a/arch/sparc64/kernel/sparc64_ksyms.c
+++ b/arch/sparc64/kernel/sparc64_ksyms.c
@@ -79,7 +79,7 @@ extern void linux_sparc_syscall(void);
 extern void rtrap(void);
 extern void show_regs(struct pt_regs *);
 extern void solaris_syscall(void);
-extern void syscall_trace(void);
+extern void syscall_trace(struct pt_regs *, int);
 extern u32 sunos_sys_table[], sys_call_table32[];
 extern void tl0_solaris(void);
 extern void sys_sigsuspend(void);
diff --git a/arch/sparc64/kernel/sys32.S b/arch/sparc64/kernel/sys32.S
index 5a95e98c5317..5f9e4fae612e 100644
--- a/arch/sparc64/kernel/sys32.S
+++ b/arch/sparc64/kernel/sys32.S
@@ -135,6 +135,8 @@ SIGN2(sys32_shutdown, sys_shutdown, %o0, %o1)
 SIGN3(sys32_socketpair, sys_socketpair, %o0, %o1, %o2)
 SIGN1(sys32_getpeername, sys_getpeername, %o0)
 SIGN1(sys32_getsockname, sys_getsockname, %o0)
+SIGN2(sys32_ioprio_get, sys_ioprio_get, %o0, %o1)
+SIGN3(sys32_ioprio_set, sys_ioprio_set, %o0, %o1, %o2)
 
 	.globl		sys32_mmap2
 sys32_mmap2:
diff --git a/arch/sparc64/kernel/systbls.S b/arch/sparc64/kernel/systbls.S
index a5e36a4c8924..bceb91a8a2bd 100644
--- a/arch/sparc64/kernel/systbls.S
+++ b/arch/sparc64/kernel/systbls.S
@@ -59,11 +59,11 @@ sys_call_table32:
 /*180*/	.word sys32_flistxattr, sys_removexattr, sys_lremovexattr, compat_sys_sigpending, sys_ni_syscall
 	.word sys32_setpgid, sys32_fremovexattr, sys32_tkill, sys32_exit_group, sparc64_newuname
 /*190*/	.word sys32_init_module, sparc64_personality, sys_remap_file_pages, sys32_epoll_create, sys32_epoll_ctl
-	.word sys32_epoll_wait, sys_nis_syscall, sys_getppid, sys32_sigaction, sys_sgetmask
+	.word sys32_epoll_wait, sys32_ioprio_set, sys_getppid, sys32_sigaction, sys_sgetmask
 /*200*/	.word sys32_ssetmask, sys_sigsuspend, compat_sys_newlstat, sys_uselib, compat_sys_old_readdir
 	.word sys32_readahead, sys32_socketcall, sys32_syslog, sys32_lookup_dcookie, sys32_fadvise64
 /*210*/	.word sys32_fadvise64_64, sys32_tgkill, sys32_waitpid, sys_swapoff, sys32_sysinfo
-	.word sys32_ipc, sys32_sigreturn, sys_clone, sys_nis_syscall, sys32_adjtimex
+	.word sys32_ipc, sys32_sigreturn, sys_clone, sys32_ioprio_get, sys32_adjtimex
 /*220*/	.word sys32_sigprocmask, sys_ni_syscall, sys32_delete_module, sys_ni_syscall, sys32_getpgid
 	.word sys32_bdflush, sys32_sysfs, sys_nis_syscall, sys32_setfsuid16, sys32_setfsgid16
 /*230*/	.word sys32_select, compat_sys_time, sys_nis_syscall, compat_sys_stime, compat_sys_statfs64
@@ -125,11 +125,11 @@ sys_call_table:
 /*180*/	.word sys_flistxattr, sys_removexattr, sys_lremovexattr, sys_nis_syscall, sys_ni_syscall
 	.word sys_setpgid, sys_fremovexattr, sys_tkill, sys_exit_group, sparc64_newuname
 /*190*/	.word sys_init_module, sparc64_personality, sys_remap_file_pages, sys_epoll_create, sys_epoll_ctl
-	.word sys_epoll_wait, sys_nis_syscall, sys_getppid, sys_nis_syscall, sys_sgetmask
+	.word sys_epoll_wait, sys_ioprio_set, sys_getppid, sys_nis_syscall, sys_sgetmask
 /*200*/	.word sys_ssetmask, sys_nis_syscall, sys_newlstat, sys_uselib, sys_nis_syscall
 	.word sys_readahead, sys_socketcall, sys_syslog, sys_lookup_dcookie, sys_fadvise64
 /*210*/	.word sys_fadvise64_64, sys_tgkill, sys_waitpid, sys_swapoff, sys_sysinfo
-	.word sys_ipc, sys_nis_syscall, sys_clone, sys_nis_syscall, sys_adjtimex
+	.word sys_ipc, sys_nis_syscall, sys_clone, sys_ioprio_get, sys_adjtimex
 /*220*/	.word sys_nis_syscall, sys_ni_syscall, sys_delete_module, sys_ni_syscall, sys_getpgid
 	.word sys_bdflush, sys_sysfs, sys_nis_syscall, sys_setfsuid, sys_setfsgid
 /*230*/	.word sys_select, sys_nis_syscall, sys_nis_syscall, sys_stime, sys_statfs64
diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index b40db389f90b..362b9c26871b 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -73,7 +73,7 @@ static __initdata struct sparc64_tick_ops dummy_tick_ops = {
 	.get_tick	= dummy_get_tick,
 };
 
-struct sparc64_tick_ops *tick_ops = &dummy_tick_ops;
+struct sparc64_tick_ops *tick_ops __read_mostly = &dummy_tick_ops;
 
 #define TICK_PRIV_BIT	(1UL << 63)
 
@@ -195,7 +195,7 @@ static unsigned long tick_add_tick(unsigned long adj, unsigned long offset)
 	return new_tick;
 }
 
-static struct sparc64_tick_ops tick_operations = {
+static struct sparc64_tick_ops tick_operations __read_mostly = {
 	.init_tick	=	tick_init_tick,
 	.get_tick	=	tick_get_tick,
 	.get_compare	=	tick_get_compare,
@@ -276,7 +276,7 @@ static unsigned long stick_add_compare(unsigned long adj)
 	return new_compare;
 }
 
-static struct sparc64_tick_ops stick_operations = {
+static struct sparc64_tick_ops stick_operations __read_mostly = {
 	.init_tick	=	stick_init_tick,
 	.get_tick	=	stick_get_tick,
 	.get_compare	=	stick_get_compare,
@@ -422,7 +422,7 @@ static unsigned long hbtick_add_compare(unsigned long adj)
 	return val;
 }
 
-static struct sparc64_tick_ops hbtick_operations = {
+static struct sparc64_tick_ops hbtick_operations __read_mostly = {
 	.init_tick	=	hbtick_init_tick,
 	.get_tick	=	hbtick_get_tick,
 	.get_compare	=	hbtick_get_compare,
@@ -437,10 +437,9 @@ static struct sparc64_tick_ops hbtick_operations = {
  * NOTE: On SUN5 systems the ticker interrupt comes in using 2
  *       interrupts, one at level14 and one with softint bit 0.
  */
-unsigned long timer_tick_offset;
-unsigned long timer_tick_compare;
+unsigned long timer_tick_offset __read_mostly;
 
-static unsigned long timer_ticks_per_nsec_quotient;
+static unsigned long timer_ticks_per_nsec_quotient __read_mostly;
 
 #define TICK_SIZE (tick_nsec / 1000)
 
@@ -464,7 +463,7 @@ static inline void timer_check_rtc(void)
 
 static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs * regs)
 {
-	unsigned long ticks, pstate;
+	unsigned long ticks, compare, pstate;
 
 	write_seqlock(&xtime_lock);
 
@@ -483,14 +482,14 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs * regs)
 				     : "=r" (pstate)
 				     : "i" (PSTATE_IE));
 
-		timer_tick_compare = tick_ops->add_compare(timer_tick_offset);
+		compare = tick_ops->add_compare(timer_tick_offset);
 		ticks = tick_ops->get_tick();
 
 		/* Restore PSTATE_IE. */
 		__asm__ __volatile__("wrpr	%0, 0x0, %%pstate"
 				     : /* no outputs */
 				     : "r" (pstate));
-	} while (time_after_eq(ticks, timer_tick_compare));
+	} while (time_after_eq(ticks, compare));
 
 	timer_check_rtc();
 
@@ -506,11 +505,6 @@ void timer_tick_interrupt(struct pt_regs *regs)
 
 	do_timer(regs);
 
-	/*
-	 * Only keep timer_tick_offset uptodate, but don't set TICK_CMPR.
-	 */
-	timer_tick_compare = tick_ops->get_compare() + timer_tick_offset;
-
 	timer_check_rtc();
 
 	write_sequnlock(&xtime_lock);
diff --git a/arch/sparc64/kernel/vmlinux.lds.S b/arch/sparc64/kernel/vmlinux.lds.S
index 382fd6798bb9..950423da8a6a 100644
--- a/arch/sparc64/kernel/vmlinux.lds.S
+++ b/arch/sparc64/kernel/vmlinux.lds.S
@@ -32,6 +32,8 @@ SECTIONS
   .data1   : { *(.data1) }
   . = ALIGN(64);
   .data.cacheline_aligned : { *(.data.cacheline_aligned) }
+  . = ALIGN(64);
+  .data.read_mostly : { *(.data.read_mostly) }
   _edata  =  .;
   PROVIDE (edata = .);
   .fixup   : { *(.fixup) }
diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c
index 3ffee7b51aed..52e9375288a9 100644
--- a/arch/sparc64/mm/fault.c
+++ b/arch/sparc64/mm/fault.c
@@ -34,22 +34,6 @@
 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
 
 /*
- * To debug kernel during syscall entry.
- */
-void syscall_trace_entry(struct pt_regs *regs)
-{
-	printk("scall entry: %s[%d]/cpu%d: %d\n", current->comm, current->pid, smp_processor_id(), (int) regs->u_regs[UREG_G1]);
-}
-
-/*
- * To debug kernel during syscall exit.
- */
-void syscall_trace_exit(struct pt_regs *regs)
-{
-	printk("scall exit: %s[%d]/cpu%d: %d\n", current->comm, current->pid, smp_processor_id(), (int) regs->u_regs[UREG_G1]);
-}
-
-/*
  * To debug kernel to catch accesses to certain virtual/physical addresses.
  * Mode = 0 selects physical watchpoints, mode = 1 selects virtual watchpoints.
  * flags = VM_READ watches memread accesses, flags = VM_WRITE watches memwrite accesses.
diff --git a/arch/sparc64/solaris/entry64.S b/arch/sparc64/solaris/entry64.S
index 0cc9dad75c5e..4b6ae583c0a3 100644
--- a/arch/sparc64/solaris/entry64.S
+++ b/arch/sparc64/solaris/entry64.S
@@ -24,8 +24,9 @@
 
 	.text
 solaris_syscall_trace:
+	add		%sp, PTREGS_OFF, %o0
 	call		syscall_trace
-	 nop
+	 mov		0, %o1
 	srl		%i0, 0, %o0
 	mov		%i4, %o4
 	srl		%i1, 0, %o1
@@ -159,8 +160,10 @@ ret_from_solaris:
 	 stx		%l2, [%sp + PTREGS_OFF + PT_V9_TNPC] !npc = npc+4 
 
 solaris_syscall_trace2:
+	add		%sp, PTREGS_OFF, %o0
 	call		syscall_trace
-	 add		%l1, 0x4, %l2			/* npc = npc+4 */
+	 mov		1, %o1
+	add		%l1, 0x4, %l2			/* npc = npc+4 */
 	andcc		%l1, 1, %g0
 	bne,pn		%icc, 2b
 	 nop