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-rw-r--r--arch/arm/kernel/armksyms.c2
-rw-r--r--arch/arm/kernel/cpuidle.c4
-rw-r--r--arch/arm/kernel/devtree.c5
-rw-r--r--arch/arm/kernel/entry-armv.S2
-rw-r--r--arch/arm/kernel/entry-common.S53
-rw-r--r--arch/arm/kernel/head.S2
-rw-r--r--arch/arm/kernel/hyp-stub.S1
-rw-r--r--arch/arm/kernel/iwmmxt.S1
-rw-r--r--arch/arm/kernel/signal.c5
-rw-r--r--arch/arm/kernel/sleep.S1
-rw-r--r--arch/arm/kernel/stacktrace.c1
-rw-r--r--arch/arm/kernel/topology.c3
12 files changed, 58 insertions, 22 deletions
diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c
index 8e8d20cdbce7..5266fd9ad6b4 100644
--- a/arch/arm/kernel/armksyms.c
+++ b/arch/arm/kernel/armksyms.c
@@ -87,6 +87,8 @@ EXPORT_SYMBOL(__raw_writesl);
EXPORT_SYMBOL(strchr);
EXPORT_SYMBOL(strrchr);
EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(__memset32);
+EXPORT_SYMBOL(__memset64);
EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memmove);
EXPORT_SYMBOL(memchr);
diff --git a/arch/arm/kernel/cpuidle.c b/arch/arm/kernel/cpuidle.c
index a3308ad1a024..fda5579123a8 100644
--- a/arch/arm/kernel/cpuidle.c
+++ b/arch/arm/kernel/cpuidle.c
@@ -101,8 +101,8 @@ static int __init arm_cpuidle_read_ops(struct device_node *dn, int cpu)
ops = arm_cpuidle_get_ops(enable_method);
if (!ops) {
- pr_warn("%s: unsupported enable-method property: %s\n",
- dn->full_name, enable_method);
+ pr_warn("%pOF: unsupported enable-method property: %s\n",
+ dn, enable_method);
return -EOPNOTSUPP;
}
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index f676febbb270..ecaa68dd1af5 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -95,7 +95,7 @@ void __init arm_dt_init_cpu_maps(void)
if (of_node_cmp(cpu->type, "cpu"))
continue;
- pr_debug(" * %s...\n", cpu->full_name);
+ pr_debug(" * %pOF...\n", cpu);
/*
* A device tree containing CPU nodes with missing "reg"
* properties is considered invalid to build the
@@ -103,8 +103,7 @@ void __init arm_dt_init_cpu_maps(void)
*/
cell = of_get_property(cpu, "reg", &prop_bytes);
if (!cell || prop_bytes < sizeof(*cell)) {
- pr_debug(" * %s missing reg property\n",
- cpu->full_name);
+ pr_debug(" * %pOF missing reg property\n", cpu);
of_node_put(cpu);
return;
}
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index c731f0d2b2af..fbc707626b3e 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -721,6 +721,7 @@ do_fpe:
*/
.pushsection .data
+ .align 2
ENTRY(fp_enter)
.word no_fp
.popsection
@@ -1224,6 +1225,7 @@ vector_addrexcptn:
W(b) vector_fiq
.data
+ .align 2
.globl cr_alignment
cr_alignment:
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index eb5cd77bf1d8..ca3614dc6938 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -27,6 +27,14 @@
#include "entry-header.S"
+saved_psr .req r8
+#if defined(CONFIG_TRACE_IRQFLAGS) || defined(CONFIG_CONTEXT_TRACKING)
+saved_pc .req r9
+#define TRACE(x...) x
+#else
+saved_pc .req lr
+#define TRACE(x...)
+#endif
.align 5
#if !(IS_ENABLED(CONFIG_TRACE_IRQFLAGS) || IS_ENABLED(CONFIG_CONTEXT_TRACKING))
@@ -41,7 +49,9 @@ ret_fast_syscall:
UNWIND(.cantunwind )
disable_irq_notrace @ disable interrupts
ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
- tst r1, #_TIF_SYSCALL_WORK | _TIF_WORK_MASK
+ tst r1, #_TIF_SYSCALL_WORK
+ bne fast_work_pending
+ tst r1, #_TIF_WORK_MASK
bne fast_work_pending
/* perform architecture specific actions before user return */
@@ -67,12 +77,15 @@ ret_fast_syscall:
str r0, [sp, #S_R0 + S_OFF]! @ save returned r0
disable_irq_notrace @ disable interrupts
ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
- tst r1, #_TIF_SYSCALL_WORK | _TIF_WORK_MASK
+ tst r1, #_TIF_SYSCALL_WORK
+ bne fast_work_pending
+ tst r1, #_TIF_WORK_MASK
beq no_work_pending
UNWIND(.fnend )
ENDPROC(ret_fast_syscall)
/* Slower path - fall through to work_pending */
+fast_work_pending:
#endif
tst r1, #_TIF_SYSCALL_WORK
@@ -141,16 +154,17 @@ ENTRY(vector_swi)
ARM( stmdb r8, {sp, lr}^ ) @ Calling sp, lr
THUMB( mov r8, sp )
THUMB( store_user_sp_lr r8, r10, S_SP ) @ calling sp, lr
- mrs r8, spsr @ called from non-FIQ mode, so ok.
- str lr, [sp, #S_PC] @ Save calling PC
- str r8, [sp, #S_PSR] @ Save CPSR
+ mrs saved_psr, spsr @ called from non-FIQ mode, so ok.
+ TRACE( mov saved_pc, lr )
+ str saved_pc, [sp, #S_PC] @ Save calling PC
+ str saved_psr, [sp, #S_PSR] @ Save CPSR
str r0, [sp, #S_OLD_R0] @ Save OLD_R0
#endif
zero_fp
alignment_trap r10, ip, __cr_alignment
- enable_irq
- ct_user_exit
- get_thread_info tsk
+ asm_trace_hardirqs_on save=0
+ enable_irq_notrace
+ ct_user_exit save=0
/*
* Get the system call number.
@@ -163,11 +177,11 @@ ENTRY(vector_swi)
* value to determine if it is an EABI or an old ABI call.
*/
#ifdef CONFIG_ARM_THUMB
- tst r8, #PSR_T_BIT
+ tst saved_psr, #PSR_T_BIT
movne r10, #0 @ no thumb OABI emulation
- USER( ldreq r10, [lr, #-4] ) @ get SWI instruction
+ USER( ldreq r10, [saved_pc, #-4] ) @ get SWI instruction
#else
- USER( ldr r10, [lr, #-4] ) @ get SWI instruction
+ USER( ldr r10, [saved_pc, #-4] ) @ get SWI instruction
#endif
ARM_BE8(rev r10, r10) @ little endian instruction
@@ -178,15 +192,17 @@ ENTRY(vector_swi)
*/
#elif defined(CONFIG_ARM_THUMB)
/* Legacy ABI only, possibly thumb mode. */
- tst r8, #PSR_T_BIT @ this is SPSR from save_user_regs
+ tst saved_psr, #PSR_T_BIT @ this is SPSR from save_user_regs
addne scno, r7, #__NR_SYSCALL_BASE @ put OS number in
- USER( ldreq scno, [lr, #-4] )
+ USER( ldreq scno, [saved_pc, #-4] )
#else
/* Legacy ABI only. */
- USER( ldr scno, [lr, #-4] ) @ get SWI instruction
+ USER( ldr scno, [saved_pc, #-4] ) @ get SWI instruction
#endif
+ /* saved_psr and saved_pc are now dead */
+
uaccess_disable tbl
adr tbl, sys_call_table @ load syscall table pointer
@@ -205,6 +221,12 @@ ENTRY(vector_swi)
bic scno, scno, #0xff000000 @ mask off SWI op-code
eor scno, scno, #__NR_SYSCALL_BASE @ check OS number
#endif
+ get_thread_info tsk
+ /*
+ * Reload the registers that may have been corrupted on entry to
+ * the syscall assembly (by tracing or context tracking.)
+ */
+ TRACE( ldmia sp, {r0 - r3} )
local_restart:
ldr r10, [tsk, #TI_FLAGS] @ check for syscall tracing
@@ -234,8 +256,9 @@ local_restart:
* current task.
*/
9001:
- sub lr, lr, #4
+ sub lr, saved_pc, #4
str lr, [sp, #S_PC]
+ get_thread_info tsk
b ret_fast_syscall
#endif
ENDPROC(vector_swi)
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 04286fd9e09c..6b1148cafffd 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -556,6 +556,7 @@ ENDPROC(__fixup_smp)
.word __smpalt_end
.pushsection .data
+ .align 2
.globl smp_on_up
smp_on_up:
ALT_SMP(.long 1)
@@ -716,6 +717,7 @@ ENTRY(fixup_pv_table)
ENDPROC(fixup_pv_table)
.data
+ .align 2
.globl __pv_phys_pfn_offset
.type __pv_phys_pfn_offset, %object
__pv_phys_pfn_offset:
diff --git a/arch/arm/kernel/hyp-stub.S b/arch/arm/kernel/hyp-stub.S
index ec7e7377d423..60146e32619a 100644
--- a/arch/arm/kernel/hyp-stub.S
+++ b/arch/arm/kernel/hyp-stub.S
@@ -31,6 +31,7 @@
* zeroing of .bss would clobber it.
*/
.data
+ .align 2
ENTRY(__boot_cpu_mode)
.long 0
.text
diff --git a/arch/arm/kernel/iwmmxt.S b/arch/arm/kernel/iwmmxt.S
index 49fadbda8c63..81cd4d43b3ec 100644
--- a/arch/arm/kernel/iwmmxt.S
+++ b/arch/arm/kernel/iwmmxt.S
@@ -367,6 +367,7 @@ ENTRY(iwmmxt_task_release)
ENDPROC(iwmmxt_task_release)
.data
+ .align 2
concan_owner:
.word 0
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 5814298ef0b7..e2de50bf8742 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -14,6 +14,7 @@
#include <linux/uaccess.h>
#include <linux/tracehook.h>
#include <linux/uprobes.h>
+#include <linux/syscalls.h>
#include <asm/elf.h>
#include <asm/cacheflush.h>
@@ -613,6 +614,10 @@ do_work_pending(struct pt_regs *regs, unsigned int thread_flags, int syscall)
* Update the trace code with the current status.
*/
trace_hardirqs_off();
+
+ /* Check valid user FS if needed */
+ addr_limit_user_check();
+
do {
if (likely(thread_flags & _TIF_NEED_RESCHED)) {
schedule();
diff --git a/arch/arm/kernel/sleep.S b/arch/arm/kernel/sleep.S
index 0f6c1000582c..9f08d214d05a 100644
--- a/arch/arm/kernel/sleep.S
+++ b/arch/arm/kernel/sleep.S
@@ -171,6 +171,7 @@ mpidr_hash_ptr:
.long mpidr_hash - . @ mpidr_hash struct offset
.data
+ .align 2
.type sleep_save_sp, #object
ENTRY(sleep_save_sp)
.space SLEEP_SAVE_SP_SZ @ struct sleep_save_sp
diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c
index 3a2fa203637a..65228bf4c6df 100644
--- a/arch/arm/kernel/stacktrace.c
+++ b/arch/arm/kernel/stacktrace.c
@@ -171,6 +171,7 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
__save_stack_trace(tsk, trace, 1);
}
+EXPORT_SYMBOL(save_stack_trace_tsk);
void save_stack_trace(struct stack_trace *trace)
{
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
index bf949a763dbe..24ac3cab411d 100644
--- a/arch/arm/kernel/topology.c
+++ b/arch/arm/kernel/topology.c
@@ -127,8 +127,7 @@ static void __init parse_dt_topology(void)
rate = of_get_property(cn, "clock-frequency", &len);
if (!rate || len != 4) {
- pr_err("%s missing clock-frequency property\n",
- cn->full_name);
+ pr_err("%pOF missing clock-frequency property\n", cn);
continue;
}
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