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

Merge sparc bug fixes that didn't make it into v3.9 into
sparc-next.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 22 deletions

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 94feff7d613..4d5e6f8a797 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -45,6 +45,7 @@ _TIF_TRACE    = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
 
 STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
 STACK_SIZE  = 1 << STACK_SHIFT
+STACK_INIT  = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
 
 #define BASED(name) name-system_call(%r13)
 
@@ -97,10 +98,10 @@ STACK_SIZE  = 1 << STACK_SHIFT
 	sra	%r14,\shift
 	jnz	1f
 	CHECK_STACK 1<<\shift,\savearea
+	ahi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	j	2f
 1:	l	%r15,\stack		# load target stack
-2:	ahi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
-	la	%r11,STACK_FRAME_OVERHEAD(%r15)
+2:	la	%r11,STACK_FRAME_OVERHEAD(%r15)
 	.endm
 
 	.macro	ADD64 high,low,timer
@@ -150,7 +151,7 @@ ENTRY(__switch_to)
 	l	%r4,__THREAD_info(%r2)		# get thread_info of prev
 	l	%r5,__THREAD_info(%r3)		# get thread_info of next
 	lr	%r15,%r5
-	ahi	%r15,STACK_SIZE			# end of kernel stack of next
+	ahi	%r15,STACK_INIT			# end of kernel stack of next
 	st	%r3,__LC_CURRENT		# store task struct of next
 	st	%r5,__LC_THREAD_INFO		# store thread info of next
 	st	%r15,__LC_KERNEL_STACK		# store end of kernel stack
@@ -178,7 +179,6 @@ sysc_stm:
 	l	%r13,__LC_SVC_NEW_PSW+4
 sysc_per:
 	l	%r15,__LC_KERNEL_STACK
-	ahi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	la	%r11,STACK_FRAME_OVERHEAD(%r15)	# pointer to pt_regs
 sysc_vtime:
 	UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER
@@ -188,6 +188,7 @@ sysc_vtime:
 	mvc	__PT_INT_CODE(4,%r11),__LC_SVC_ILC
 sysc_do_svc:
 	oi	__TI_flags+3(%r12),_TIF_SYSCALL
+	l	%r10,__TI_sysc_table(%r12)	# 31 bit system call table
 	lh	%r8,__PT_INT_CODE+2(%r11)
 	sla	%r8,2				# shift and test for svc0
 	jnz	sysc_nr_ok
@@ -198,7 +199,6 @@ sysc_do_svc:
 	lr	%r8,%r1
 	sla	%r8,2
 sysc_nr_ok:
-	l	%r10,BASED(.Lsys_call_table)	# 31 bit system call table
 	xc	__SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
 	st	%r2,__PT_ORIG_GPR2(%r11)
 	st	%r7,STACK_FRAME_OVERHEAD(%r15)
@@ -359,11 +359,11 @@ ENTRY(pgm_check_handler)
 	tm	__LC_PGM_ILC+3,0x80	# check for per exception
 	jnz	pgm_svcper		# -> single stepped svc
 0:	CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC
+	ahi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	j	2f
 1:	UPDATE_VTIME %r14,%r15,__LC_SYNC_ENTER_TIMER
 	l	%r15,__LC_KERNEL_STACK
-2:	ahi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
-	la	%r11,STACK_FRAME_OVERHEAD(%r15)
+2:	la	%r11,STACK_FRAME_OVERHEAD(%r15)
 	stm	%r0,%r7,__PT_R0(%r11)
 	mvc	__PT_R8(32,%r11),__LC_SAVE_AREA_SYNC
 	stm	%r8,%r9,__PT_PSW(%r11)
@@ -485,7 +485,6 @@ io_work:
 #
 io_work_user:
 	l	%r1,__LC_KERNEL_STACK
-	ahi	%r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	mvc	STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
 	xc	__SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
 	la	%r11,STACK_FRAME_OVERHEAD(%r1)
@@ -646,7 +645,6 @@ mcck_skip:
 	tm	__PT_PSW+1(%r11),0x01	# returning to user ?
 	jno	mcck_return
 	l	%r1,__LC_KERNEL_STACK	# switch to kernel stack
-	ahi	%r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	mvc	STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
 	xc	__SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
 	la	%r11,STACK_FRAME_OVERHEAD(%r15)
@@ -674,6 +672,7 @@ mcck_panic:
 	sra	%r14,PAGE_SHIFT
 	jz	0f
 	l	%r15,__LC_PANIC_STACK
+	j	mcck_skip
 0:	ahi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	j	mcck_skip
 
@@ -714,12 +713,10 @@ ENTRY(restart_int_handler)
  */
 stack_overflow:
 	l	%r15,__LC_PANIC_STACK	# change to panic stack
-	ahi	%r15,-__PT_SIZE		# create pt_regs
-	stm	%r0,%r7,__PT_R0(%r15)
-	stm	%r8,%r9,__PT_PSW(%r15)
+	la	%r11,STACK_FRAME_OVERHEAD(%r15)
+	stm	%r0,%r7,__PT_R0(%r11)
+	stm	%r8,%r9,__PT_PSW(%r11)
 	mvc	__PT_R8(32,%r11),0(%r14)
-	lr	%r15,%r11
-	ahi	%r15,-STACK_FRAME_OVERHEAD
 	l	%r1,BASED(1f)
 	xc	__SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
 	lr	%r2,%r11		# pass pointer to pt_regs
@@ -799,15 +796,14 @@ cleanup_system_call:
 	mvc	__LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
 	# set up saved register 11
 	l	%r15,__LC_KERNEL_STACK
-	ahi	%r15,-__PT_SIZE
-	st	%r15,12(%r11)		# r11 pt_regs pointer
+	la	%r9,STACK_FRAME_OVERHEAD(%r15)
+	st	%r9,12(%r11)		# r11 pt_regs pointer
 	# fill pt_regs
-	mvc	__PT_R8(32,%r15),__LC_SAVE_AREA_SYNC
-	stm	%r0,%r7,__PT_R0(%r15)
-	mvc	__PT_PSW(8,%r15),__LC_SVC_OLD_PSW
-	mvc	__PT_INT_CODE(4,%r15),__LC_SVC_ILC
+	mvc	__PT_R8(32,%r9),__LC_SAVE_AREA_SYNC
+	stm	%r0,%r7,__PT_R0(%r9)
+	mvc	__PT_PSW(8,%r9),__LC_SVC_OLD_PSW
+	mvc	__PT_INT_CODE(4,%r9),__LC_SVC_ILC
 	# setup saved register 15
-	ahi	%r15,-STACK_FRAME_OVERHEAD
 	st	%r15,28(%r11)		# r15 stack pointer
 	# set new psw address and exit
 	l	%r9,BASED(cleanup_table+4)	# sysc_do_svc + 0x80000000
@@ -910,7 +906,6 @@ cleanup_idle_wait:
 .Ltrace_enter:		.long	do_syscall_trace_enter
 .Ltrace_exit:		.long	do_syscall_trace_exit
 .Lschedule_tail:	.long	schedule_tail
-.Lsys_call_table:	.long	sys_call_table
 .Lsysc_per:		.long	sysc_per + 0x80000000
 #ifdef CONFIG_TRACE_IRQFLAGS
 .Lhardirqs_on:		.long	trace_hardirqs_on_caller