diff options
Diffstat (limited to 'arch/microblaze')
| -rw-r--r-- | arch/microblaze/Kconfig | 11 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/gpio.h | 57 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/kvm_para.h | 1 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/processor.h | 1 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/thread_info.h | 18 | ||||
| -rw-r--r-- | arch/microblaze/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/microblaze/kernel/entry-nommu.S | 20 | ||||
| -rw-r--r-- | arch/microblaze/kernel/entry.S | 37 | ||||
| -rw-r--r-- | arch/microblaze/kernel/init_task.c | 26 | ||||
| -rw-r--r-- | arch/microblaze/kernel/mcount.S | 2 | ||||
| -rw-r--r-- | arch/microblaze/kernel/process.c | 6 | ||||
| -rw-r--r-- | arch/microblaze/kernel/ptrace.c | 2 | ||||
| -rw-r--r-- | arch/microblaze/kernel/signal.c | 106 | ||||
| -rw-r--r-- | arch/microblaze/mm/fault.c | 33 | ||||
| -rw-r--r-- | arch/microblaze/pci/pci-common.c | 1 |
15 files changed, 128 insertions, 195 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index ac22dc7f4cab..0bf44231aaf9 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -22,6 +22,7 @@ config MICROBLAZE select GENERIC_PCI_IOMAP select GENERIC_CPU_DEVICES select GENERIC_ATOMIC64 + select GENERIC_CLOCKEVENTS config SWAP def_bool n @@ -50,14 +51,8 @@ config GENERIC_HWEIGHT config GENERIC_CALIBRATE_DELAY def_bool y -config GENERIC_TIME_VSYSCALL - def_bool n - -config GENERIC_CLOCKEVENTS - def_bool y - config GENERIC_GPIO - def_bool y + bool config GENERIC_CSUM def_bool y @@ -79,8 +74,6 @@ source "arch/microblaze/platform/Kconfig.platform" menu "Processor type and features" -source "kernel/time/Kconfig" - source "kernel/Kconfig.preempt" source "kernel/Kconfig.hz" diff --git a/arch/microblaze/include/asm/gpio.h b/arch/microblaze/include/asm/gpio.h index 2b2c18be71c6..b3799d88ffcf 100644 --- a/arch/microblaze/include/asm/gpio.h +++ b/arch/microblaze/include/asm/gpio.h @@ -1,53 +1,4 @@ -/* - * Generic GPIO API implementation for PowerPC. - * - * Copyright (c) 2007-2008 MontaVista Software, Inc. - * - * Author: Anton Vorontsov <avorontsov@ru.mvista.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#ifndef _ASM_MICROBLAZE_GPIO_H -#define _ASM_MICROBLAZE_GPIO_H - -#include <linux/errno.h> -#include <asm-generic/gpio.h> - -#ifdef CONFIG_GPIOLIB - -/* - * We don't (yet) implement inlined/rapid versions for on-chip gpios. - * Just call gpiolib. - */ -static inline int gpio_get_value(unsigned int gpio) -{ - return __gpio_get_value(gpio); -} - -static inline void gpio_set_value(unsigned int gpio, int value) -{ - __gpio_set_value(gpio, value); -} - -static inline int gpio_cansleep(unsigned int gpio) -{ - return __gpio_cansleep(gpio); -} - -static inline int gpio_to_irq(unsigned int gpio) -{ - return __gpio_to_irq(gpio); -} - -static inline int irq_to_gpio(unsigned int irq) -{ - return -EINVAL; -} - -#endif /* CONFIG_GPIOLIB */ - -#endif /* _ASM_MICROBLAZE_GPIO_H */ +#ifndef __LINUX_GPIO_H +#warning Include linux/gpio.h instead of asm/gpio.h +#include <linux/gpio.h> +#endif diff --git a/arch/microblaze/include/asm/kvm_para.h b/arch/microblaze/include/asm/kvm_para.h new file mode 100644 index 000000000000..14fab8f0b957 --- /dev/null +++ b/arch/microblaze/include/asm/kvm_para.h @@ -0,0 +1 @@ +#include <asm-generic/kvm_para.h> diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index bffb54527299..af2bb9652392 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -23,7 +23,6 @@ extern const struct seq_operations cpuinfo_op; # define cpu_relax() barrier() # define cpu_sleep() do {} while (0) -# define prepare_to_copy(tsk) do {} while (0) #define task_pt_regs(tsk) \ (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h index 1a8ab6a5c03f..6c610234ffab 100644 --- a/arch/microblaze/include/asm/thread_info.h +++ b/arch/microblaze/include/asm/thread_info.h @@ -166,7 +166,23 @@ static inline void set_restore_sigmask(void) { struct thread_info *ti = current_thread_info(); ti->status |= TS_RESTORE_SIGMASK; - set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags); + WARN_ON(!test_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags)); +} +static inline void clear_restore_sigmask(void) +{ + current_thread_info()->status &= ~TS_RESTORE_SIGMASK; +} +static inline bool test_restore_sigmask(void) +{ + return current_thread_info()->status & TS_RESTORE_SIGMASK; +} +static inline bool test_and_clear_restore_sigmask(void) +{ + struct thread_info *ti = current_thread_info(); + if (!(ti->status & TS_RESTORE_SIGMASK)) + return false; + ti->status &= ~TS_RESTORE_SIGMASK; + return true; } #endif diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile index 494b63b72dd7..928c950fc14c 100644 --- a/arch/microblaze/kernel/Makefile +++ b/arch/microblaze/kernel/Makefile @@ -16,7 +16,7 @@ endif extra-y := head.o vmlinux.lds obj-y += dma.o exceptions.o \ - hw_exception_handler.o init_task.o intc.o irq.o \ + hw_exception_handler.o intc.o irq.o \ process.o prom.o prom_parse.o ptrace.o \ reset.o setup.o signal.o sys_microblaze.o timer.o traps.o unwind.o diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S index 34b526f59b43..75c3ea1f48a1 100644 --- a/arch/microblaze/kernel/entry-nommu.S +++ b/arch/microblaze/kernel/entry-nommu.S @@ -132,11 +132,10 @@ ret_from_intr: beqi r11, 1f bralid r15, schedule nop -1: andi r11, r19, _TIF_SIGPENDING +1: andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME beqid r11, no_intr_resched addk r5, r1, r0 - addk r7, r0, r0 - bralid r15, do_signal + bralid r15, do_notify_resume addk r6, r0, r0 no_intr_resched: @@ -292,8 +291,8 @@ ENTRY(_user_exception) /* * Debug traps are like a system call, but entered via brki r14, 0x60 - * All we need to do is send the SIGTRAP signal to current, ptrace and do_signal - * will handle the rest + * All we need to do is send the SIGTRAP signal to current, ptrace and + * do_notify_resume will handle the rest */ ENTRY(_debug_exception) swi r1, r0, PER_CPU(ENTRY_SP) /* save the current sp */ @@ -482,12 +481,11 @@ work_pending: beqi r11, 1f bralid r15, schedule nop -1: andi r11, r19, _TIF_SIGPENDING +1: andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME beqi r11, no_work_pending addk r5, r1, r0 - addik r7, r0, 1 - bralid r15, do_signal - addk r6, r0, r0 + bralid r15, do_notify_resume + addik r6, r0, 1 bri no_work_pending ENTRY(ret_to_user) @@ -569,10 +567,6 @@ sys_rt_sigreturn_wrapper: brid sys_rt_sigreturn addk r5, r1, r0 -sys_rt_sigsuspend_wrapper: - brid sys_rt_sigsuspend - addk r7, r1, r0 - /* Interrupt vector table */ .section .init.ivt, "ax" .org 0x0 diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S index 66e34a3bfe1b..03f7b8ce6b6b 100644 --- a/arch/microblaze/kernel/entry.S +++ b/arch/microblaze/kernel/entry.S @@ -430,13 +430,12 @@ C_ENTRY(ret_from_trap): 5: /* get thread info from current task*/ lwi r11, CURRENT_TASK, TS_THREAD_INFO; lwi r11, r11, TI_FLAGS; /* get flags in thread info */ - andi r11, r11, _TIF_SIGPENDING; + andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME; beqi r11, 1f; /* Signals to handle, handle them */ addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */ - addi r7, r0, 1; /* Arg 3: int in_syscall */ - bralid r15, do_signal; /* Handle any signals */ - add r6, r0, r0; /* Arg 2: sigset_t *oldset */ + bralid r15, do_notify_resume; /* Handle any signals */ + addi r6, r0, 1; /* Arg 2: int in_syscall */ /* Finally, return to user state. */ 1: set_bip; /* Ints masked for state restore */ @@ -493,10 +492,11 @@ C_ENTRY(sys_clone): bnei r6, 1f; /* See if child SP arg (arg 1) is 0. */ lwi r6, r1, PT_R1; /* If so, use paret's stack ptr */ 1: addik r7, r1, 0; /* Arg 2: parent context */ - add r8, r0, r0; /* Arg 3: (unused) */ - add r9, r0, r0; /* Arg 4: (unused) */ + lwi r9, r1, PT_R8; /* parent tid. */ + lwi r10, r1, PT_R9; /* child tid. */ + /* do_fork will pick up TLS from regs->r10. */ brid do_fork /* Do real work (tail-call) */ - add r10, r0, r0; /* Arg 5: (unused) */ + add r8, r0, r0; /* Arg 3: (unused) */ C_ENTRY(sys_execve): brid microblaze_execve; /* Do real work (tail-call).*/ @@ -622,7 +622,7 @@ C_ENTRY(ret_from_exc): /* Maybe handle a signal */ 5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ lwi r11, r11, TI_FLAGS; /* get flags in thread info */ - andi r11, r11, _TIF_SIGPENDING; + andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME; beqi r11, 1f; /* Signals to handle, handle them */ /* @@ -635,11 +635,10 @@ C_ENTRY(ret_from_exc): * traps), but signal handlers may want to examine or change the * complete register state. Here we save anything not saved by * the normal entry sequence, so that it may be safely restored - * (in a possibly modified form) after do_signal returns. */ + * (in a possibly modified form) after do_notify_resume returns. */ addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */ - addi r7, r0, 0; /* Arg 3: int in_syscall */ - bralid r15, do_signal; /* Handle any signals */ - add r6, r0, r0; /* Arg 2: sigset_t *oldset */ + bralid r15, do_notify_resume; /* Handle any signals */ + addi r6, r0, 0; /* Arg 2: int in_syscall */ /* Finally, return to user state. */ 1: set_bip; /* Ints masked for state restore */ @@ -732,13 +731,12 @@ ret_from_irq: /* Maybe handle a signal */ 5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* MS: get thread info */ lwi r11, r11, TI_FLAGS; /* get flags in thread info */ - andi r11, r11, _TIF_SIGPENDING; + andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME; beqid r11, no_intr_resched /* Handle a signal return; Pending signals should be in r18. */ - addi r7, r0, 0; /* Arg 3: int in_syscall */ addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */ - bralid r15, do_signal; /* Handle any signals */ - add r6, r0, r0; /* Arg 2: sigset_t *oldset */ + bralid r15, do_notify_resume; /* Handle any signals */ + addi r6, r0, 0; /* Arg 2: int in_syscall */ /* Finally, return to user state. */ no_intr_resched: @@ -869,13 +867,12 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */ /* Maybe handle a signal */ 5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */ lwi r11, r11, TI_FLAGS; /* get flags in thread info */ - andi r11, r11, _TIF_SIGPENDING; + andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME; beqi r11, 1f; /* Signals to handle, handle them */ addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */ - addi r7, r0, 0; /* Arg 3: int in_syscall */ - bralid r15, do_signal; /* Handle any signals */ - add r6, r0, r0; /* Arg 2: sigset_t *oldset */ + bralid r15, do_notify_resume; /* Handle any signals */ + addi r6, r0, 0; /* Arg 2: int in_syscall */ /* Finally, return to user state. */ 1: swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */ diff --git a/arch/microblaze/kernel/init_task.c b/arch/microblaze/kernel/init_task.c deleted file mode 100644 index b5d711f94ff8..000000000000 --- a/arch/microblaze/kernel/init_task.c +++ /dev/null @@ -1,26 +0,0 @@ -/* - * Copyright (C) 2009 Michal Simek <monstr@monstr.eu> - * Copyright (C) 2009 PetaLogix - * Copyright (C) 2006 Atmark Techno, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/init_task.h> -#include <linux/fs.h> -#include <linux/mqueue.h> - -#include <asm/pgtable.h> - -static struct signal_struct init_signals = INIT_SIGNALS(init_signals); -static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); - -union thread_union init_thread_union __init_task_data = - { INIT_THREAD_INFO(init_task) }; - -struct task_struct init_task = INIT_TASK(init_task); -EXPORT_SYMBOL(init_task); diff --git a/arch/microblaze/kernel/mcount.S b/arch/microblaze/kernel/mcount.S index e7eaa7a8cbd3..fc1e1322ce4c 100644 --- a/arch/microblaze/kernel/mcount.S +++ b/arch/microblaze/kernel/mcount.S @@ -138,7 +138,7 @@ NOALIGN_ENTRY(ftrace_call) #endif /* CONFIG_DYNAMIC_FTRACE */ /* static normal trace */ lwi r6, r1, 120; /* MS: load parent addr */ - addik r5, r15, 0; /* MS: load current function addr */ + addik r5, r15, -4; /* MS: load current function addr */ /* MS: here is dependency on previous code */ brald r15, r20; /* MS: jump to ftrace handler */ nop; diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index 883b92789cdf..1944e00f07e1 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -182,8 +182,12 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, #endif ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8; + /* + * r21 is the thread reg, r10 is 6th arg to clone + * which contains TLS area + */ if (clone_flags & CLONE_SETTLS) - ; + childregs->r21 = childregs->r10; return 0; } diff --git a/arch/microblaze/kernel/ptrace.c b/arch/microblaze/kernel/ptrace.c index 6eb2aa927d89..ab1b9db661f3 100644 --- a/arch/microblaze/kernel/ptrace.c +++ b/arch/microblaze/kernel/ptrace.c @@ -136,7 +136,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs) { long ret = 0; - secure_computing(regs->r12); + secure_computing_strict(regs->r12); if (test_thread_flag(TIF_SYSCALL_TRACE) && tracehook_report_syscall_entry(regs)) diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c index 599671168980..76b9722557db 100644 --- a/arch/microblaze/kernel/signal.c +++ b/arch/microblaze/kernel/signal.c @@ -31,6 +31,7 @@ #include <linux/personality.h> #include <linux/percpu.h> #include <linux/linkage.h> +#include <linux/tracehook.h> #include <asm/entry.h> #include <asm/ucontext.h> #include <linux/uaccess.h> @@ -40,10 +41,6 @@ #include <asm/cacheflush.h> #include <asm/syscalls.h> -#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) - -asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_sycall); - asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, struct pt_regs *regs) @@ -98,17 +95,16 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs) sigset_t set; int rval; + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) goto badframe; if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) goto badframe; - sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&set); if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval)) goto badframe; @@ -169,7 +165,7 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) return (void __user *)((sp - frame_size) & -8UL); } -static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, +static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs *regs) { struct rt_sigframe __user *frame; @@ -267,12 +263,11 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, current->comm, current->pid, frame, regs->pc); #endif - return; + return 0; give_sigsegv: - if (sig == SIGSEGV) - ka->sa.sa_handler = SIG_DFL; - force_sig(SIGSEGV, current); + force_sigsegv(sig, current); + return -EFAULT; } /* Handle restarting system calls */ @@ -312,28 +307,23 @@ do_restart: * OK, we're invoking a handler */ -static int +static void handle_signal(unsigned long sig, struct k_sigaction *ka, - siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) + siginfo_t *info, struct pt_regs *regs) { + sigset_t *oldset = sigmask_to_save(); + int ret; + /* Set up the stack frame */ if (ka->sa.sa_flags & SA_SIGINFO) - setup_rt_frame(sig, ka, info, oldset, regs); + ret = setup_rt_frame(sig, ka, info, oldset, regs); else - setup_rt_frame(sig, ka, NULL, oldset, regs); - - if (ka->sa.sa_flags & SA_ONESHOT) - ka->sa.sa_handler = SIG_DFL; - - if (!(ka->sa.sa_flags & SA_NODEFER)) { - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, - ¤t->blocked, &ka->sa.sa_mask); - sigaddset(¤t->blocked, sig); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - } - return 1; + ret = setup_rt_frame(sig, ka, NULL, oldset, regs); + + if (ret) + return; + + signal_delivered(sig, info, ka, regs, 0); } /* @@ -345,46 +335,24 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, * the kernel can handle, and then we build all the user-level signal handling * stack-frames in one go after that. */ -int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall) +static void do_signal(struct pt_regs *regs, int in_syscall) { siginfo_t info; int signr; struct k_sigaction ka; #ifdef DEBUG_SIG - printk(KERN_INFO "do signal: %p %p %d\n", regs, oldset, in_syscall); + printk(KERN_INFO "do signal: %p %d\n", regs, in_syscall); printk(KERN_INFO "do signal2: %lx %lx %ld [%lx]\n", regs->pc, regs->r1, regs->r12, current_thread_info()->flags); #endif - /* - * We want the common case to go fast, which - * is why we may in certain cases get here from - * kernel mode. Just return without doing anything - * if so. - */ - if (kernel_mode(regs)) - return 1; - - if (current_thread_info()->status & TS_RESTORE_SIGMASK) - oldset = ¤t->saved_sigmask; - else - oldset = ¤t->blocked; signr = get_signal_to_deliver(&info, &ka, regs, NULL); if (signr > 0) { /* Whee! Actually deliver the signal. */ if (in_syscall) handle_restart(regs, &ka, 1); - if (handle_signal(signr, &ka, &info, oldset, regs)) { - /* - * A signal was successfully delivered; the saved - * sigmask will have been stored in the signal frame, - * and will be restored by sigreturn, so we can simply - * clear the TS_RESTORE_SIGMASK flag. - */ - current_thread_info()->status &= - ~TS_RESTORE_SIGMASK; - } - return 1; + handle_signal(signr, &ka, &info, regs); + return; } if (in_syscall) @@ -394,11 +362,23 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall) * If there's no signal to deliver, we just put the saved sigmask * back. */ - if (current_thread_info()->status & TS_RESTORE_SIGMASK) { - current_thread_info()->status &= ~TS_RESTORE_SIGMASK; - sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); - } + restore_saved_sigmask(); +} - /* Did we come from a system call? */ - return 0; +void do_notify_resume(struct pt_regs *regs, int in_syscall) +{ + /* + * We want the common case to go fast, which + * is why we may in certain cases get here from + * kernel mode. Just return without doing anything + * if so. + */ + if (kernel_mode(regs)) + return; + + if (test_thread_flag(TIF_SIGPENDING)) + do_signal(regs, in_syscall); + + if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) + tracehook_notify_resume(regs); } diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c index c38a265846de..eb365d6795fa 100644 --- a/arch/microblaze/mm/fault.c +++ b/arch/microblaze/mm/fault.c @@ -92,6 +92,8 @@ void do_page_fault(struct pt_regs *regs, unsigned long address, int code = SEGV_MAPERR; int is_write = error_code & ESR_S; int fault; + unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE | + (is_write ? FAULT_FLAG_WRITE : 0); regs->ear = address; regs->esr = error_code; @@ -138,6 +140,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address, if (kernel_mode(regs) && !search_exception_tables(regs->pc)) goto bad_area_nosemaphore; +retry: down_read(&mm->mmap_sem); } @@ -210,7 +213,11 @@ good_area: * make sure we exit gracefully rather than endlessly redo * the fault. */ - fault = handle_mm_fault(mm, vma, address, is_write ? FAULT_FLAG_WRITE : 0); + fault = handle_mm_fault(mm, vma, address, flags); + + if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) + return; + if (unlikely(fault & VM_FAULT_ERROR)) { if (fault & VM_FAULT_OOM) goto out_of_memory; @@ -218,11 +225,27 @@ good_area: goto do_sigbus; BUG(); } - if (unlikely(fault & VM_FAULT_MAJOR)) - current->maj_flt++; - else - current->min_flt++; + + if (flags & FAULT_FLAG_ALLOW_RETRY) { + if (unlikely(fault & VM_FAULT_MAJOR)) + current->maj_flt++; + else + current->min_flt++; + if (fault & VM_FAULT_RETRY) { + flags &= ~FAULT_FLAG_ALLOW_RETRY; + + /* + * No need to up_read(&mm->mmap_sem) as we would + * have already released it in __lock_page_or_retry + * in mm/filemap.c. + */ + + goto retry; + } + } + up_read(&mm->mmap_sem); + /* * keep track of tlb+htab misses that are good addrs but * just need pte's created via handle_mm_fault() diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c index d10403dadd2b..ed22bfc5db14 100644 --- a/arch/microblaze/pci/pci-common.c +++ b/arch/microblaze/pci/pci-common.c @@ -1422,6 +1422,7 @@ int pcibios_enable_device(struct pci_dev *dev, int mask) static void __devinit pcibios_setup_phb_resources(struct pci_controller *hose, struct list_head *resources) { + unsigned long io_offset; struct resource *res; int i; |