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-rw-r--r--arch/arc/kernel/arcksyms.c2
-rw-r--r--arch/arc/kernel/ctx_sw_asm.S3
-rw-r--r--arch/arc/kernel/entry-compact.S18
-rw-r--r--arch/arc/kernel/entry.S24
-rw-r--r--arch/arc/kernel/intc-arcv2.c2
-rw-r--r--arch/arc/kernel/intc-compact.c6
-rw-r--r--arch/arc/kernel/module.c19
-rw-r--r--arch/arc/kernel/perf_event.c8
-rw-r--r--arch/arc/kernel/process.c2
-rw-r--r--arch/arc/kernel/setup.c21
-rw-r--r--arch/arc/kernel/signal.c10
-rw-r--r--arch/arc/kernel/stacktrace.c2
-rw-r--r--arch/arc/kernel/time.c99
-rw-r--r--arch/arc/kernel/troubleshoot.c2
-rw-r--r--arch/arc/kernel/unwind.c24
-rw-r--r--arch/arc/kernel/vmlinux.lds.S22
16 files changed, 117 insertions, 147 deletions
diff --git a/arch/arc/kernel/arcksyms.c b/arch/arc/kernel/arcksyms.c
index 4d9e77724bed..000dd041ab42 100644
--- a/arch/arc/kernel/arcksyms.c
+++ b/arch/arc/kernel/arcksyms.c
@@ -28,6 +28,7 @@ extern void __muldf3(void);
extern void __divdf3(void);
extern void __floatunsidf(void);
extern void __floatunsisf(void);
+extern void __udivdi3(void);
EXPORT_SYMBOL(__ashldi3);
EXPORT_SYMBOL(__ashrdi3);
@@ -45,6 +46,7 @@ EXPORT_SYMBOL(__muldf3);
EXPORT_SYMBOL(__divdf3);
EXPORT_SYMBOL(__floatunsidf);
EXPORT_SYMBOL(__floatunsisf);
+EXPORT_SYMBOL(__udivdi3);
/* ARC optimised assembler routines */
EXPORT_SYMBOL(memset);
diff --git a/arch/arc/kernel/ctx_sw_asm.S b/arch/arc/kernel/ctx_sw_asm.S
index e6890b1f8650..7c1f365ef3d2 100644
--- a/arch/arc/kernel/ctx_sw_asm.S
+++ b/arch/arc/kernel/ctx_sw_asm.S
@@ -23,6 +23,7 @@
.global __switch_to
.type __switch_to, @function
__switch_to:
+ CFI_STARTPROC
/* Save regs on kernel mode stack of task */
st.a blink, [sp, -4]
@@ -59,4 +60,4 @@ __switch_to:
ld.ab blink, [sp, 4]
j [blink]
-END(__switch_to)
+END_CFI(__switch_to)
diff --git a/arch/arc/kernel/entry-compact.S b/arch/arc/kernel/entry-compact.S
index 0cb0abaa0479..98812c1248df 100644
--- a/arch/arc/kernel/entry-compact.S
+++ b/arch/arc/kernel/entry-compact.S
@@ -91,27 +91,13 @@ VECTOR mem_service ; 0x8, Mem exception (0x1)
VECTOR instr_service ; 0x10, Instrn Error (0x2)
; ******************** Device ISRs **********************
-#ifdef CONFIG_ARC_IRQ3_LV2
-VECTOR handle_interrupt_level2
-#else
-VECTOR handle_interrupt_level1
-#endif
-
-VECTOR handle_interrupt_level1
-
-#ifdef CONFIG_ARC_IRQ5_LV2
-VECTOR handle_interrupt_level2
-#else
-VECTOR handle_interrupt_level1
-#endif
-
-#ifdef CONFIG_ARC_IRQ6_LV2
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
-.rept 25
+.rept 28
VECTOR handle_interrupt_level1 ; Other devices
.endr
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index 2efb0625331d..1eea99beecc3 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -35,7 +35,7 @@ ENTRY(sys_clone_wrapper)
btst r10, TIF_SYSCALL_TRACE
bnz tracesys_exit
- b ret_from_system_call
+ b .Lret_from_system_call
END(sys_clone_wrapper)
ENTRY(ret_from_fork)
@@ -61,18 +61,6 @@ ENTRY(ret_from_fork)
b ret_from_exception
END(ret_from_fork)
-#ifdef CONFIG_ARC_DW2_UNWIND
-; Workaround for bug 94179 (STAR ):
-; Despite -fasynchronous-unwind-tables, linker is not making dwarf2 unwinder
-; section (.debug_frame) as loadable. So we force it here.
-; This also fixes STAR 9000487933 where the prev-workaround (objcopy --setflag)
-; would not work after a clean build due to kernel build system dependencies.
-.section .debug_frame, "wa",@progbits
-
-; Reset to .text as this file is included in entry-<isa>.S
-.section .text, "ax",@progbits
-#endif
-
;################### Non TLB Exception Handling #############################
; ---------------------------------------------
@@ -260,20 +248,18 @@ ENTRY(EV_Trap)
; syscall num shd not exceed the total system calls avail
cmp r8, NR_syscalls
mov.hi r0, -ENOSYS
- bhi ret_from_system_call
+ bhi .Lret_from_system_call
; Offset into the syscall_table and call handler
ld.as r9,[sys_call_table, r8]
jl [r9] ; Entry into Sys Call Handler
- ; fall through to ret_from_system_call
-END(EV_Trap)
-
-ENTRY(ret_from_system_call)
+.Lret_from_system_call:
st r0, [sp, PT_r0] ; sys call return value in pt_regs
- ; fall through yet again to ret_from_exception
+ ; fall through to ret_from_exception
+END(EV_Trap)
;############# Return from Intr/Excp/Trap (Linux Specifics) ##############
;
diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c
index 6c24faf48b16..62b59409a5d9 100644
--- a/arch/arc/kernel/intc-arcv2.c
+++ b/arch/arc/kernel/intc-arcv2.c
@@ -74,7 +74,7 @@ void arc_init_IRQ(void)
tmp = read_aux_reg(0xa);
tmp |= STATUS_AD_MASK | (irq_prio << 1);
tmp &= ~STATUS_IE_MASK;
- asm volatile("flag %0 \n"::"r"(tmp));
+ asm volatile("kflag %0 \n"::"r"(tmp));
}
static void arcv2_irq_mask(struct irq_data *data)
diff --git a/arch/arc/kernel/intc-compact.c b/arch/arc/kernel/intc-compact.c
index c5cceca36118..ce9deb953ca9 100644
--- a/arch/arc/kernel/intc-compact.c
+++ b/arch/arc/kernel/intc-compact.c
@@ -28,10 +28,8 @@ void arc_init_IRQ(void)
{
int level_mask = 0;
- /* setup any high priority Interrupts (Level2 in ARCompact jargon) */
- level_mask |= IS_ENABLED(CONFIG_ARC_IRQ3_LV2) << 3;
- level_mask |= IS_ENABLED(CONFIG_ARC_IRQ5_LV2) << 5;
- level_mask |= IS_ENABLED(CONFIG_ARC_IRQ6_LV2) << 6;
+ /* Is timer high priority Interrupt (Level2 in ARCompact jargon) */
+ level_mask |= IS_ENABLED(CONFIG_ARC_COMPACT_IRQ_LEVELS) << TIMER0_IRQ;
/*
* Write to register, even if no LV2 IRQs configured to reset it
diff --git a/arch/arc/kernel/module.c b/arch/arc/kernel/module.c
index 376e04622962..9a2849756022 100644
--- a/arch/arc/kernel/module.c
+++ b/arch/arc/kernel/module.c
@@ -22,13 +22,9 @@ static inline void arc_write_me(unsigned short *addr, unsigned long value)
*(addr + 1) = (value & 0xffff);
}
-/* ARC specific section quirks - before relocation loop in generic loader
- *
- * For dwarf unwinding out of modules, this needs to
- * 1. Ensure the .debug_frame is allocatable (ARC Linker bug: despite
- * -fasynchronous-unwind-tables it doesn't).
- * 2. Since we are iterating thru sec hdr tbl anyways, make a note of
- * the exact section index, for later use.
+/*
+ * This gets called before relocation loop in generic loader
+ * Make a note of the section index of unwinding section
*/
int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
char *secstr, struct module *mod)
@@ -40,8 +36,7 @@ int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
mod->arch.unw_info = NULL;
for (i = 1; i < hdr->e_shnum; i++) {
- if (strcmp(secstr+sechdrs[i].sh_name, ".debug_frame") == 0) {
- sechdrs[i].sh_flags |= SHF_ALLOC;
+ if (strcmp(secstr+sechdrs[i].sh_name, ".eh_frame") == 0) {
mod->arch.unw_sec_idx = i;
break;
}
@@ -106,10 +101,12 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
*/
relo_type = ELF32_R_TYPE(rel_entry[i].r_info);
- if (likely(R_ARC_32_ME == relo_type))
+ if (likely(R_ARC_32_ME == relo_type)) /* ME ( S + A ) */
arc_write_me((unsigned short *)location, relocation);
- else if (R_ARC_32 == relo_type)
+ else if (R_ARC_32 == relo_type) /* ( S + A ) */
*((Elf32_Addr *) location) = relocation;
+ else if (R_ARC_32_PCREL == relo_type) /* ( S + A ) - PDATA ) */
+ *((Elf32_Addr *) location) = relocation - location;
else
goto relo_err;
diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index 6fd48021324b..2ce24e74f879 100644
--- a/arch/arc/kernel/perf_event.c
+++ b/arch/arc/kernel/perf_event.c
@@ -108,7 +108,7 @@ static void arc_perf_event_update(struct perf_event *event,
int64_t delta = new_raw_count - prev_raw_count;
/*
- * We don't afaraid of hwc->prev_count changing beneath our feet
+ * We aren't afraid of hwc->prev_count changing beneath our feet
* because there's no way for us to re-enter this function anytime.
*/
local64_set(&hwc->prev_count, new_raw_count);
@@ -179,8 +179,8 @@ static int arc_pmu_event_init(struct perf_event *event)
if (arc_pmu->ev_hw_idx[event->attr.config] < 0)
return -ENOENT;
hwc->config |= arc_pmu->ev_hw_idx[event->attr.config];
- pr_debug("init event %d with h/w %d \'%s\'\n",
- (int) event->attr.config, (int) hwc->config,
+ pr_debug("init event %d with h/w %08x \'%s\'\n",
+ (int)event->attr.config, (int)hwc->config,
arc_pmu_ev_hw_map[event->attr.config]);
return 0;
@@ -189,6 +189,8 @@ static int arc_pmu_event_init(struct perf_event *event)
if (ret < 0)
return ret;
hwc->config |= arc_pmu->ev_hw_idx[ret];
+ pr_debug("init cache event with h/w %08x \'%s\'\n",
+ (int)hwc->config, arc_pmu_ev_hw_map[ret]);
return 0;
default:
return -ENOENT;
diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index b5db9e7fd649..be1972bd2729 100644
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -199,7 +199,7 @@ int elf_check_arch(const struct elf32_hdr *x)
}
eflags = x->e_flags;
- if ((eflags & EF_ARC_OSABI_MSK) < EF_ARC_OSABI_CURRENT) {
+ if ((eflags & EF_ARC_OSABI_MSK) != EF_ARC_OSABI_CURRENT) {
pr_err("ABI mismatch - you need newer toolchain\n");
force_sigsegv(SIGSEGV, current);
return 0;
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index f63b8bfefb0c..3df7f9c72f42 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -14,7 +14,7 @@
#include <linux/module.h>
#include <linux/cpu.h>
#include <linux/of_fdt.h>
-#include <linux/of_platform.h>
+#include <linux/of.h>
#include <linux/cache.h>
#include <asm/sections.h>
#include <asm/arcregs.h>
@@ -171,6 +171,7 @@ static const struct cpuinfo_data arc_cpu_tbl[] = {
#else
{ {0x50, "ARC HS38 R2.0"}, 0x51},
{ {0x52, "ARC HS38 R2.1"}, 0x52},
+ { {0x53, "ARC HS38 R3.0"}, 0x53},
#endif
{ {0x00, NULL } }
};
@@ -272,8 +273,8 @@ static char *arc_extn_mumbojumbo(int cpu_id, char *buf, int len)
FIX_PTR(cpu);
n += scnprintf(buf + n, len - n,
- "Vector Table\t: %#x\nUncached Base\t: %#lx\n",
- cpu->vec_base, perip_base);
+ "Vector Table\t: %#x\nPeripherals\t: %#lx:%#lx\n",
+ cpu->vec_base, perip_base, perip_end);
if (cpu->extn.fpu_sp || cpu->extn.fpu_dp)
n += scnprintf(buf + n, len - n, "FPU\t\t: %s%s\n",
@@ -291,8 +292,10 @@ static char *arc_extn_mumbojumbo(int cpu_id, char *buf, int len)
cpu->dccm.base_addr, TO_KB(cpu->dccm.sz),
cpu->iccm.base_addr, TO_KB(cpu->iccm.sz));
- n += scnprintf(buf + n, len - n,
- "OS ABI [v3]\t: no-legacy-syscalls\n");
+ n += scnprintf(buf + n, len - n, "OS ABI [v%d]\t: %s\n",
+ EF_ARC_OSABI_CURRENT >> 8,
+ EF_ARC_OSABI_CURRENT == EF_ARC_OSABI_V3 ?
+ "no-legacy-syscalls" : "64-bit data any register aligned");
return buf;
}
@@ -392,7 +395,7 @@ void __init setup_arch(char **cmdline_p)
/*
* If we are here, it is established that @uboot_arg didn't
* point to DT blob. Instead if u-boot says it is cmdline,
- * Appent to embedded DT cmdline.
+ * append to embedded DT cmdline.
* setup_machine_fdt() would have populated @boot_command_line
*/
if (uboot_tag == 1) {
@@ -435,12 +438,6 @@ void __init setup_arch(char **cmdline_p)
static int __init customize_machine(void)
{
- /*
- * Traverses flattened DeviceTree - registering platform devices
- * (if any) complete with their resources
- */
- of_platform_default_populate(NULL, NULL, NULL);
-
if (machine_desc->init_machine)
machine_desc->init_machine();
diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index 004b7f0bc76c..d347bbc086fe 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -34,7 +34,7 @@
* -ViXS were still seeing crashes when using insmod to load drivers.
* It turned out that the code to change Execute permssions for TLB entries
* of user was not guarded for interrupts (mod_tlb_permission)
- * This was cauing TLB entries to be overwritten on unrelated indexes
+ * This was causing TLB entries to be overwritten on unrelated indexes
*
* Vineetg: July 15th 2008: Bug #94183
* -Exception happens in Delay slot of a JMP, and before user space resumes,
@@ -107,13 +107,13 @@ static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
struct user_regs_struct uregs;
err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
- if (!err)
- set_current_blocked(&set);
-
err |= __copy_from_user(&uregs.scratch,
&(sf->uc.uc_mcontext.regs.scratch),
sizeof(sf->uc.uc_mcontext.regs.scratch));
+ if (err)
+ return err;
+ set_current_blocked(&set);
regs->bta = uregs.scratch.bta;
regs->lp_start = uregs.scratch.lp_start;
regs->lp_end = uregs.scratch.lp_end;
@@ -138,7 +138,7 @@ static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
regs->r0 = uregs.scratch.r0;
regs->sp = uregs.scratch.sp;
- return err;
+ return 0;
}
static inline int is_do_ss_needed(unsigned int magic)
diff --git a/arch/arc/kernel/stacktrace.c b/arch/arc/kernel/stacktrace.c
index e0efff15a5ae..b9192a653b7e 100644
--- a/arch/arc/kernel/stacktrace.c
+++ b/arch/arc/kernel/stacktrace.c
@@ -142,7 +142,7 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
* prelogue is setup (callee regs saved and then fp set and not other
* way around
*/
- pr_warn("CONFIG_ARC_DW2_UNWIND needs to be enabled\n");
+ pr_warn_once("CONFIG_ARC_DW2_UNWIND needs to be enabled\n");
return 0;
#endif
diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
index 4549ab255dd1..f927b8dc6edd 100644
--- a/arch/arc/kernel/time.c
+++ b/arch/arc/kernel/time.c
@@ -116,19 +116,19 @@ static struct clocksource arc_counter_gfrc = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-static void __init arc_cs_setup_gfrc(struct device_node *node)
+static int __init arc_cs_setup_gfrc(struct device_node *node)
{
int exists = cpuinfo_arc700[0].extn.gfrc;
int ret;
if (WARN(!exists, "Global-64-bit-Ctr clocksource not detected"))
- return;
+ return -ENXIO;
ret = arc_get_timer_clk(node);
if (ret)
- return;
+ return ret;
- clocksource_register_hz(&arc_counter_gfrc, arc_timer_freq);
+ return clocksource_register_hz(&arc_counter_gfrc, arc_timer_freq);
}
CLOCKSOURCE_OF_DECLARE(arc_gfrc, "snps,archs-timer-gfrc", arc_cs_setup_gfrc);
@@ -172,25 +172,25 @@ static struct clocksource arc_counter_rtc = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-static void __init arc_cs_setup_rtc(struct device_node *node)
+static int __init arc_cs_setup_rtc(struct device_node *node)
{
int exists = cpuinfo_arc700[smp_processor_id()].extn.rtc;
int ret;
if (WARN(!exists, "Local-64-bit-Ctr clocksource not detected"))
- return;
+ return -ENXIO;
/* Local to CPU hence not usable in SMP */
if (WARN(IS_ENABLED(CONFIG_SMP), "Local-64-bit-Ctr not usable in SMP"))
- return;
+ return -EINVAL;
ret = arc_get_timer_clk(node);
if (ret)
- return;
+ return ret;
write_aux_reg(AUX_RTC_CTRL, 1);
- clocksource_register_hz(&arc_counter_rtc, arc_timer_freq);
+ return clocksource_register_hz(&arc_counter_rtc, arc_timer_freq);
}
CLOCKSOURCE_OF_DECLARE(arc_rtc, "snps,archs-timer-rtc", arc_cs_setup_rtc);
@@ -213,23 +213,23 @@ static struct clocksource arc_counter_timer1 = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-static void __init arc_cs_setup_timer1(struct device_node *node)
+static int __init arc_cs_setup_timer1(struct device_node *node)
{
int ret;
/* Local to CPU hence not usable in SMP */
if (IS_ENABLED(CONFIG_SMP))
- return;
+ return -EINVAL;
ret = arc_get_timer_clk(node);
if (ret)
- return;
+ return ret;
write_aux_reg(ARC_REG_TIMER1_LIMIT, ARC_TIMER_MAX);
write_aux_reg(ARC_REG_TIMER1_CNT, 0);
write_aux_reg(ARC_REG_TIMER1_CTRL, TIMER_CTRL_NH);
- clocksource_register_hz(&arc_counter_timer1, arc_timer_freq);
+ return clocksource_register_hz(&arc_counter_timer1, arc_timer_freq);
}
/********** Clock Event Device *********/
@@ -296,73 +296,76 @@ static irqreturn_t timer_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static int arc_timer_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
+
+static int arc_timer_starting_cpu(unsigned int cpu)
{
struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
evt->cpumask = cpumask_of(smp_processor_id());
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- clockevents_config_and_register(evt, arc_timer_freq,
- 0, ULONG_MAX);
- enable_percpu_irq(arc_timer_irq, 0);
- break;
- case CPU_DYING:
- disable_percpu_irq(arc_timer_irq);
- break;
- }
-
- return NOTIFY_OK;
+ clockevents_config_and_register(evt, arc_timer_freq, 0, ARC_TIMER_MAX);
+ enable_percpu_irq(arc_timer_irq, 0);
+ return 0;
}
-static struct notifier_block arc_timer_cpu_nb = {
- .notifier_call = arc_timer_cpu_notify,
-};
+static int arc_timer_dying_cpu(unsigned int cpu)
+{
+ disable_percpu_irq(arc_timer_irq);
+ return 0;
+}
/*
* clockevent setup for boot CPU
*/
-static void __init arc_clockevent_setup(struct device_node *node)
+static int __init arc_clockevent_setup(struct device_node *node)
{
struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
int ret;
- register_cpu_notifier(&arc_timer_cpu_nb);
-
arc_timer_irq = irq_of_parse_and_map(node, 0);
- if (arc_timer_irq <= 0)
- panic("clockevent: missing irq");
+ if (arc_timer_irq <= 0) {
+ pr_err("clockevent: missing irq");
+ return -EINVAL;
+ }
ret = arc_get_timer_clk(node);
- if (ret)
- panic("clockevent: missing clk");
-
- evt->irq = arc_timer_irq;
- evt->cpumask = cpumask_of(smp_processor_id());
- clockevents_config_and_register(evt, arc_timer_freq,
- 0, ARC_TIMER_MAX);
+ if (ret) {
+ pr_err("clockevent: missing clk");
+ return ret;
+ }
/* Needs apriori irq_set_percpu_devid() done in intc map function */
ret = request_percpu_irq(arc_timer_irq, timer_irq_handler,
"Timer0 (per-cpu-tick)", evt);
- if (ret)
- panic("clockevent: unable to request irq\n");
+ if (ret) {
+ pr_err("clockevent: unable to request irq\n");
+ return ret;
+ }
- enable_percpu_irq(arc_timer_irq, 0);
+ ret = cpuhp_setup_state(CPUHP_AP_ARC_TIMER_STARTING,
+ "AP_ARC_TIMER_STARTING",
+ arc_timer_starting_cpu,
+ arc_timer_dying_cpu);
+ if (ret) {
+ pr_err("Failed to setup hotplug state");
+ return ret;
+ }
+ return 0;
}
-static void __init arc_of_timer_init(struct device_node *np)
+static int __init arc_of_timer_init(struct device_node *np)
{
static int init_count = 0;
+ int ret;
if (!init_count) {
init_count = 1;
- arc_clockevent_setup(np);
+ ret = arc_clockevent_setup(np);
} else {
- arc_cs_setup_timer1(np);
+ ret = arc_cs_setup_timer1(np);
}
+
+ return ret;
}
CLOCKSOURCE_OF_DECLARE(arc_clkevt, "snps,arc-timer", arc_of_timer_init);
diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c
index a6f91e88ce36..934150e7ac48 100644
--- a/arch/arc/kernel/troubleshoot.c
+++ b/arch/arc/kernel/troubleshoot.c
@@ -276,7 +276,7 @@ static int tlb_stats_open(struct inode *inode, struct file *file)
return 0;
}
-/* called on user read(): display the couters */
+/* called on user read(): display the counters */
static ssize_t tlb_stats_output(struct file *file, /* file descriptor */
char __user *user_buf, /* user buffer */
size_t len, /* length of buffer */
diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c
index 0587bf121d11..61fd1ce63c56 100644
--- a/arch/arc/kernel/unwind.c
+++ b/arch/arc/kernel/unwind.c
@@ -111,6 +111,8 @@ UNW_REGISTER_INFO};
#define DW_EH_PE_indirect 0x80
#define DW_EH_PE_omit 0xff
+#define CIE_ID 0
+
typedef unsigned long uleb128_t;
typedef signed long sleb128_t;
@@ -232,6 +234,7 @@ void __init arc_unwind_init(void)
static const u32 bad_cie, not_fde;
static const u32 *cie_for_fde(const u32 *fde, const struct unwind_table *);
+static const u32 *__cie_for_fde(const u32 *fde);
static signed fde_pointer_type(const u32 *cie);
struct eh_frame_hdr_table_entry {
@@ -338,10 +341,9 @@ static void init_unwind_hdr(struct unwind_table *table,
for (fde = table->address, tableSize = table->size, n = 0;
tableSize;
tableSize -= sizeof(*fde) + *fde, fde += 1 + *fde / sizeof(*fde)) {
- /* const u32 *cie = fde + 1 - fde[1] / sizeof(*fde); */
- const u32 *cie = (const u32 *)(fde[1]);
+ const u32 *cie = __cie_for_fde(fde);
- if (fde[1] == 0xffffffff)
+ if (fde[1] == CIE_ID)
continue; /* this is a CIE */
ptr = (const u8 *)(fde + 2);
header->table[n].start = read_pointer(&ptr,
@@ -504,6 +506,15 @@ static sleb128_t get_sleb128(const u8 **pcur, const u8 *end)
return value;
}
+static const u32 *__cie_for_fde(const u32 *fde)
+{
+ const u32 *cie;
+
+ cie = fde + 1 - fde[1] / sizeof(*fde);
+
+ return cie;
+}
+
static const u32 *cie_for_fde(const u32 *fde, const struct unwind_table *table)
{
const u32 *cie;
@@ -511,19 +522,18 @@ static const u32 *cie_for_fde(const u32 *fde, const struct unwind_table *table)
if (!*fde || (*fde & (sizeof(*fde) - 1)))
return &bad_cie;
- if (fde[1] == 0xffffffff)
+ if (fde[1] == CIE_ID)
return &not_fde; /* this is a CIE */
if ((fde[1] & (sizeof(*fde) - 1)))
/* || fde[1] > (unsigned long)(fde + 1) - (unsigned long)table->address) */
return NULL; /* this is not a valid FDE */
- /* cie = fde + 1 - fde[1] / sizeof(*fde); */
- cie = (u32 *) fde[1];
+ cie = __cie_for_fde(fde);
if (*cie <= sizeof(*cie) + 4 || *cie >= fde[1] - sizeof(*fde)
|| (*cie & (sizeof(*cie) - 1))
- || (cie[1] != 0xffffffff))
+ || (cie[1] != CIE_ID))
return NULL; /* this is not a (valid) CIE */
return cie;
}
diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S
index 894e696bddaa..f35ed578e007 100644
--- a/arch/arc/kernel/vmlinux.lds.S
+++ b/arch/arc/kernel/vmlinux.lds.S
@@ -82,14 +82,6 @@ SECTIONS
PERCPU_SECTION(L1_CACHE_BYTES)
- /*
- * .exit.text is discard at runtime, not link time, to deal with
- * references from .debug_frame
- * It will be init freed, being inside [__init_start : __init_end]
- */
- .exit.text : { EXIT_TEXT }
- .exit.data : { EXIT_DATA }
-
. = ALIGN(PAGE_SIZE);
__init_end = .;
@@ -97,6 +89,7 @@ SECTIONS
_text = .;
TEXT_TEXT
SCHED_TEXT
+ CPUIDLE_TEXT
LOCK_TEXT
KPROBES_TEXT
*(.fixup)
@@ -120,18 +113,13 @@ SECTIONS
#ifdef CONFIG_ARC_DW2_UNWIND
. = ALIGN(PAGE_SIZE);
- .debug_frame : {
+ .eh_frame : {
__start_unwind = .;
- *(.debug_frame)
+ *(.eh_frame)
__end_unwind = .;
}
- /*
- * gcc 4.8 generates this for -fasynchonous-unwind-tables,
- * while we still use the .debug_frame based unwinder
- */
- /DISCARD/ : { *(.eh_frame) }
#else
- /DISCARD/ : { *(.debug_frame) }
+ /DISCARD/ : { *(.eh_frame) }
#endif
NOTES
@@ -148,7 +136,7 @@ SECTIONS
}
#ifndef CONFIG_DEBUG_INFO
- /* open-coded because we need .debug_frame seperately for unwinding */
+ /DISCARD/ : { *(.debug_frame) }
/DISCARD/ : { *(.debug_aranges) }
/DISCARD/ : { *(.debug_pubnames) }
/DISCARD/ : { *(.debug_info) }
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