From da1677b02d3ef674dfd8a4ba1ed32153dc717fa2 Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Tue, 14 May 2013 13:28:17 +0530 Subject: ARC: Disintegrate arcregs.h * Move the various sub-system defines/types into relevant files/functions (reduces compilation time) * move CPU specific stuff out of asm/tlb.h into asm/mmu.h Signed-off-by: Vineet Gupta --- arch/arc/mm/fault.c | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arc/mm/fault.c') diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index 689ffd86d5e..c0decc1f8d2 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -15,6 +15,7 @@ #include #include #include +#include static int handle_vmalloc_fault(struct mm_struct *mm, unsigned long address) { -- cgit v1.2.3-70-g09d2 From 3e1ae441886b82fbf605f37ac0756b811d55f3d5 Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Wed, 12 Jun 2013 13:49:02 +0530 Subject: ARC: [mm] Remove @write argument to do_page_fault() This can be ascertained within do_page_fault() since it gets the full ECR (Exception Cause Register). Further, for both the callers of do_page_fault(): Prot-V / D-TLB-Miss, the cause sub-fields in ECR are same for same type of access, making the code much more simpler. D-TLB-Miss [LD] 0x00_21_01_00 Prot-V [LD] 0x00_23_01_00 ^^ D-TLB-Miss [ST] 0x00_21_02_00 Prot-V [ST] 0x00_23_02_00 ^^ D-TLB-Miss [EX] 0x00_21_03_00 Prot-V [EX] 0x00_23_03_00 ^^ This helps code consolidation, which is even better when moving code from assembler to "C". Signed-off-by: Vineet Gupta --- arch/arc/kernel/entry.S | 14 ++++---------- arch/arc/mm/fault.c | 3 ++- arch/arc/mm/tlbex.S | 14 ++------------ 3 files changed, 8 insertions(+), 23 deletions(-) (limited to 'arch/arc/mm/fault.c') diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index 0c6d664d4a8..53655bf4c9d 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -355,8 +355,8 @@ ARC_ENTRY EV_TLBProtV ; ecr and efa were not saved in case an Intr sneaks in ; after fake rtie ; - lr r3, [ecr] - lr r4, [efa] + lr r2, [ecr] + lr r1, [efa] ; Faulting Data address ; --------(4) Return from CPU Exception Mode --------- ; Fake a rtie, but rtie to next label @@ -371,23 +371,17 @@ ARC_ENTRY EV_TLBProtV ; -Access Violaton (WRITE to READ ONLY Page) - for linux COW ; -Unaligned Access (READ/WRITE on odd boundary) ; - cmp r3, 0x230400 ; Misaligned data access ? + cmp r2, 0x230400 ; Misaligned data access ? beq 4f ;========= (6a) Access Violation Processing ======== - cmp r3, 0x230100 - mov r1, 0x0 ; if LD exception ? write = 0 - mov.ne r1, 0x1 ; else write = 1 - - mov r2, r4 ; faulting address mov r0, sp ; pt_regs bl do_page_fault b ret_from_exception ;========== (6b) Non aligned access ============ 4: - mov r0, r3 ; cause code - mov r1, r4 ; faulting address + mov r0, r2 ; cause code mov r2, sp ; pt_regs #ifdef CONFIG_ARC_MISALIGN_ACCESS diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index c0decc1f8d2..fdafeb1917c 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -52,7 +52,7 @@ bad_area: return 1; } -void do_page_fault(struct pt_regs *regs, int write, unsigned long address, +void do_page_fault(struct pt_regs *regs, unsigned long address, unsigned long cause_code) { struct vm_area_struct *vma = NULL; @@ -60,6 +60,7 @@ void do_page_fault(struct pt_regs *regs, int write, unsigned long address, struct mm_struct *mm = tsk->mm; siginfo_t info; int fault, ret; + int write = cause_code & (1 << ECR_C_BIT_DTLB_ST_MISS); /* ST/EX */ unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE | (write ? FAULT_FLAG_WRITE : 0); diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S index 7bf811d51af..bd8bc90f61d 100644 --- a/arch/arc/mm/tlbex.S +++ b/arch/arc/mm/tlbex.S @@ -381,18 +381,8 @@ do_slow_path_pf: ; ------- setup args for Linux Page fault Hanlder --------- mov_s r0, sp - lr r2, [efa] - lr r3, [ecr] - - ; Both st and ex imply WRITE access of some sort, hence do_page_fault( ) - ; invoked with write=1 for DTLB-st/ex Miss and write=0 for ITLB miss or - ; DTLB-ld Miss - ; DTLB Miss Cause code is ld = 0x01 , st = 0x02, ex = 0x03 - ; Following code uses that fact that st/ex have one bit in common - - btst_s r3, ECR_C_BIT_DTLB_ST_MISS - mov.z r1, 0 - mov.nz r1, 1 + lr r1, [efa] + lr r2, [ecr] ; We don't want exceptions to be disabled while the fault is handled. ; Now that we have saved the context we return from exception hence -- cgit v1.2.3-70-g09d2 From 38a9ff6d247cf9afcbe55ea245b650b8955029fd Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Wed, 12 Jun 2013 15:13:40 +0530 Subject: ARC: Remove explicit passing around of ECR With ECR now part of pt_regs * No need to propagate from lowest asm handlers as arg * No need to save it in tsk->thread.cause_code * Avoid bit chopping to access the bit-fields More code consolidation, cleanup Signed-off-by: Vineet Gupta --- arch/arc/include/asm/bug.h | 5 ++-- arch/arc/include/asm/kgdb.h | 4 ++-- arch/arc/include/asm/kprobes.h | 6 ++--- arch/arc/include/asm/processor.h | 1 - arch/arc/include/asm/unaligned.h | 4 ++-- arch/arc/kernel/entry.S | 40 +++++++++++++------------------ arch/arc/kernel/kgdb.c | 2 +- arch/arc/kernel/kprobes.c | 5 ++-- arch/arc/kernel/traps.c | 52 +++++++++++++++++++--------------------- arch/arc/kernel/troubleshoot.c | 3 +-- arch/arc/kernel/unaligned.c | 2 +- arch/arc/mm/fault.c | 12 ++++------ arch/arc/mm/tlbex.S | 1 - 13 files changed, 59 insertions(+), 78 deletions(-) (limited to 'arch/arc/mm/fault.c') diff --git a/arch/arc/include/asm/bug.h b/arch/arc/include/asm/bug.h index 2ad8f9b1c54..5b18e94c667 100644 --- a/arch/arc/include/asm/bug.h +++ b/arch/arc/include/asm/bug.h @@ -18,9 +18,8 @@ struct task_struct; void show_regs(struct pt_regs *regs); void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs); void show_kernel_fault_diag(const char *str, struct pt_regs *regs, - unsigned long address, unsigned long cause_reg); -void die(const char *str, struct pt_regs *regs, unsigned long address, - unsigned long cause_reg); + unsigned long address); +void die(const char *str, struct pt_regs *regs, unsigned long address); #define BUG() do { \ dump_stack(); \ diff --git a/arch/arc/include/asm/kgdb.h b/arch/arc/include/asm/kgdb.h index 4930957ca3d..b65fca7ffeb 100644 --- a/arch/arc/include/asm/kgdb.h +++ b/arch/arc/include/asm/kgdb.h @@ -31,7 +31,7 @@ static inline void arch_kgdb_breakpoint(void) __asm__ __volatile__ ("trap_s 0x4\n"); } -extern void kgdb_trap(struct pt_regs *regs, int param); +extern void kgdb_trap(struct pt_regs *regs); enum arc700_linux_regnums { _R0 = 0, @@ -53,7 +53,7 @@ enum arc700_linux_regnums { }; #else -#define kgdb_trap(regs, param) +#define kgdb_trap(regs) #endif #endif /* __ARC_KGDB_H__ */ diff --git a/arch/arc/include/asm/kprobes.h b/arch/arc/include/asm/kprobes.h index 4d9c211fce7..944dbedb38b 100644 --- a/arch/arc/include/asm/kprobes.h +++ b/arch/arc/include/asm/kprobes.h @@ -50,11 +50,9 @@ struct kprobe_ctlblk { int kprobe_fault_handler(struct pt_regs *regs, unsigned long cause); void kretprobe_trampoline(void); -void trap_is_kprobe(unsigned long cause, unsigned long address, - struct pt_regs *regs); +void trap_is_kprobe(unsigned long address, struct pt_regs *regs); #else -static void trap_is_kprobe(unsigned long cause, unsigned long address, - struct pt_regs *regs) +static void trap_is_kprobe(unsigned long address, struct pt_regs *regs) { } #endif diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h index b0b5d2d9b3d..15334ab66b5 100644 --- a/arch/arc/include/asm/processor.h +++ b/arch/arc/include/asm/processor.h @@ -29,7 +29,6 @@ struct thread_struct { unsigned long ksp; /* kernel mode stack pointer */ unsigned long callee_reg; /* pointer to callee regs */ unsigned long fault_address; /* dbls as brkpt holder as well */ - unsigned long cause_code; /* Exception Cause Code (ECR) */ #ifdef CONFIG_ARC_FPU_SAVE_RESTORE struct arc_fpu fpu; #endif diff --git a/arch/arc/include/asm/unaligned.h b/arch/arc/include/asm/unaligned.h index 5dbe63f17b6..60702f3751d 100644 --- a/arch/arc/include/asm/unaligned.h +++ b/arch/arc/include/asm/unaligned.h @@ -16,11 +16,11 @@ #ifdef CONFIG_ARC_MISALIGN_ACCESS int misaligned_fixup(unsigned long address, struct pt_regs *regs, - unsigned long cause, struct callee_regs *cregs); + struct callee_regs *cregs); #else static inline int misaligned_fixup(unsigned long address, struct pt_regs *regs, - unsigned long cause, struct callee_regs *cregs) + struct callee_regs *cregs) { return 0; } diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index fb0fe326563..1d7165156e1 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -274,10 +274,8 @@ ARC_ENTRY instr_service SWITCH_TO_KERNEL_STK SAVE_ALL_SYS - lr r0, [ecr] - lr r1, [efa] - - mov r2, sp + lr r0, [efa] + mov r1, sp FAKE_RET_FROM_EXCPN r9 @@ -298,9 +296,8 @@ ARC_ENTRY mem_service SWITCH_TO_KERNEL_STK SAVE_ALL_SYS - lr r0, [ecr] - lr r1, [efa] - mov r2, sp + lr r0, [efa] + mov r1, sp bl do_memory_error b ret_from_exception ARC_EXIT mem_service @@ -317,11 +314,11 @@ ARC_ENTRY EV_MachineCheck SWITCH_TO_KERNEL_STK SAVE_ALL_SYS - lr r0, [ecr] - lr r1, [efa] - mov r2, sp + lr r2, [ecr] + lr r0, [efa] + mov r1, sp - lsr r3, r0, 8 + lsr r3, r2, 8 bmsk r3, r3, 7 brne r3, ECR_C_MCHK_DUP_TLB, 1f @@ -384,12 +381,12 @@ ARC_ENTRY EV_TLBProtV ;========== (6b) Non aligned access ============ 4: - mov r0, r2 ; cause code - mov r2, sp ; pt_regs + mov r0, r1 + mov r1, sp ; pt_regs #ifdef CONFIG_ARC_MISALIGN_ACCESS SAVE_CALLEE_SAVED_USER - mov r3, sp ; callee_regs + mov r2, sp ; callee_regs bl do_misaligned_access @@ -416,9 +413,8 @@ ARC_ENTRY EV_PrivilegeV SWITCH_TO_KERNEL_STK SAVE_ALL_SYS - lr r0, [ecr] - lr r1, [efa] - mov r2, sp + lr r0, [efa] + mov r1, sp FAKE_RET_FROM_EXCPN r9 @@ -437,9 +433,8 @@ ARC_ENTRY EV_Extension SWITCH_TO_KERNEL_STK SAVE_ALL_SYS - lr r0, [ecr] - lr r1, [efa] - mov r2, sp + lr r0, [efa] + mov r1, sp bl do_extension_fault b ret_from_exception ARC_EXIT EV_Extension @@ -495,9 +490,8 @@ tracesys_exit: trap_with_param: ; stop_pc info by gdb needs this info - mov r0, r12 - lr r1, [efa] - mov r2, sp + lr r0, [efa] + mov r1, sp ; Now that we have read EFA, its safe to do "fake" rtie ; and get out of CPU exception mode diff --git a/arch/arc/kernel/kgdb.c b/arch/arc/kernel/kgdb.c index 84f1bb8208b..a7698fb1481 100644 --- a/arch/arc/kernel/kgdb.c +++ b/arch/arc/kernel/kgdb.c @@ -169,7 +169,7 @@ int kgdb_arch_init(void) return 0; } -void kgdb_trap(struct pt_regs *regs, int param) +void kgdb_trap(struct pt_regs *regs) { /* trap_s 3 is used for breakpoints that overwrite existing * instructions, while trap_s 4 is used for compiled breakpoints. diff --git a/arch/arc/kernel/kprobes.c b/arch/arc/kernel/kprobes.c index 5a7b80e2d88..72f97822784 100644 --- a/arch/arc/kernel/kprobes.c +++ b/arch/arc/kernel/kprobes.c @@ -517,8 +517,7 @@ int __kprobes arch_trampoline_kprobe(struct kprobe *p) return 0; } -void trap_is_kprobe(unsigned long cause, unsigned long address, - struct pt_regs *regs) +void trap_is_kprobe(unsigned long address, struct pt_regs *regs) { - notify_die(DIE_TRAP, "kprobe_trap", regs, address, cause, SIGTRAP); + notify_die(DIE_TRAP, "kprobe_trap", regs, address, 0, SIGTRAP); } diff --git a/arch/arc/kernel/traps.c b/arch/arc/kernel/traps.c index 0471d9c9dd5..e21692d2fda 100644 --- a/arch/arc/kernel/traps.c +++ b/arch/arc/kernel/traps.c @@ -28,10 +28,9 @@ void __init trap_init(void) return; } -void die(const char *str, struct pt_regs *regs, unsigned long address, - unsigned long cause_reg) +void die(const char *str, struct pt_regs *regs, unsigned long address) { - show_kernel_fault_diag(str, regs, address, cause_reg); + show_kernel_fault_diag(str, regs, address); /* DEAD END */ __asm__("flag 1"); @@ -42,14 +41,13 @@ void die(const char *str, struct pt_regs *regs, unsigned long address, * -for user faults enqueues requested signal * -for kernel, chk if due to copy_(to|from)_user, otherwise die() */ -static noinline int handle_exception(unsigned long cause, char *str, - struct pt_regs *regs, siginfo_t *info) +static noinline int +handle_exception(const char *str, struct pt_regs *regs, siginfo_t *info) { if (user_mode(regs)) { struct task_struct *tsk = current; tsk->thread.fault_address = (__force unsigned int)info->si_addr; - tsk->thread.cause_code = cause; force_sig_info(info->si_signo, info, tsk); @@ -58,14 +56,14 @@ static noinline int handle_exception(unsigned long cause, char *str, if (fixup_exception(regs)) return 0; - die(str, regs, (unsigned long)info->si_addr, cause); + die(str, regs, (unsigned long)info->si_addr); } return 1; } #define DO_ERROR_INFO(signr, str, name, sicode) \ -int name(unsigned long cause, unsigned long address, struct pt_regs *regs) \ +int name(unsigned long address, struct pt_regs *regs) \ { \ siginfo_t info = { \ .si_signo = signr, \ @@ -73,7 +71,7 @@ int name(unsigned long cause, unsigned long address, struct pt_regs *regs) \ .si_code = sicode, \ .si_addr = (void __user *)address, \ }; \ - return handle_exception(cause, str, regs, &info);\ + return handle_exception(str, regs, &info);\ } /* @@ -90,11 +88,11 @@ DO_ERROR_INFO(SIGBUS, "Misaligned Access", do_misaligned_error, BUS_ADRALN) /* * Entry Point for Misaligned Data access Exception, for emulating in software */ -int do_misaligned_access(unsigned long cause, unsigned long address, - struct pt_regs *regs, struct callee_regs *cregs) +int do_misaligned_access(unsigned long address, struct pt_regs *regs, + struct callee_regs *cregs) { - if (misaligned_fixup(address, regs, cause, cregs) != 0) - return do_misaligned_error(cause, address, regs); + if (misaligned_fixup(address, regs, cregs) != 0) + return do_misaligned_error(address, regs); return 0; } @@ -104,10 +102,9 @@ int do_misaligned_access(unsigned long cause, unsigned long address, * Entry point for miscll errors such as Nested Exceptions * -Duplicate TLB entry is handled seperately though */ -void do_machine_check_fault(unsigned long cause, unsigned long address, - struct pt_regs *regs) +void do_machine_check_fault(unsigned long address, struct pt_regs *regs) { - die("Machine Check Exception", regs, address, cause); + die("Machine Check Exception", regs, address); } @@ -120,23 +117,22 @@ void do_machine_check_fault(unsigned long cause, unsigned long address, * -1 used for software breakpointing (gdb) * -2 used by kprobes */ -void do_non_swi_trap(unsigned long cause, unsigned long address, - struct pt_regs *regs) +void do_non_swi_trap(unsigned long address, struct pt_regs *regs) { - unsigned int param = cause & 0xff; + unsigned int param = regs->ecr_param; switch (param) { case 1: - trap_is_brkpt(cause, address, regs); + trap_is_brkpt(address, regs); break; case 2: - trap_is_kprobe(param, address, regs); + trap_is_kprobe(address, regs); break; case 3: case 4: - kgdb_trap(regs, param); + kgdb_trap(regs); break; default: @@ -149,14 +145,14 @@ void do_non_swi_trap(unsigned long cause, unsigned long address, * -For a corner case, ARC kprobes implementation resorts to using * this exception, hence the check */ -void do_insterror_or_kprobe(unsigned long cause, - unsigned long address, - struct pt_regs *regs) +void do_insterror_or_kprobe(unsigned long address, struct pt_regs *regs) { + int rc; + /* Check if this exception is caused by kprobes */ - if (notify_die(DIE_IERR, "kprobe_ierr", regs, address, - cause, SIGILL) == NOTIFY_STOP) + rc = notify_die(DIE_IERR, "kprobe_ierr", regs, address, 0, SIGILL); + if (rc == NOTIFY_STOP) return; - insterror_is_error(cause, address, regs); + insterror_is_error(address, regs); } diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c index 977464126be..7f85bc3f710 100644 --- a/arch/arc/kernel/troubleshoot.c +++ b/arch/arc/kernel/troubleshoot.c @@ -209,10 +209,9 @@ void show_regs(struct pt_regs *regs) } void show_kernel_fault_diag(const char *str, struct pt_regs *regs, - unsigned long address, unsigned long cause_reg) + unsigned long address) { current->thread.fault_address = address; - current->thread.cause_code = cause_reg; /* Caller and Callee regs */ show_regs(regs); diff --git a/arch/arc/kernel/unaligned.c b/arch/arc/kernel/unaligned.c index 4cd81633feb..c0f832f595d 100644 --- a/arch/arc/kernel/unaligned.c +++ b/arch/arc/kernel/unaligned.c @@ -187,7 +187,7 @@ fault: state->fault = 1; * Returns 0 if successfully handled, 1 if some error happened */ int misaligned_fixup(unsigned long address, struct pt_regs *regs, - unsigned long cause, struct callee_regs *cregs) + struct callee_regs *cregs) { struct disasm_state state; char buf[TASK_COMM_LEN]; diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index fdafeb1917c..318164cabdf 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -52,15 +52,14 @@ bad_area: return 1; } -void do_page_fault(struct pt_regs *regs, unsigned long address, - unsigned long cause_code) +void do_page_fault(struct pt_regs *regs, unsigned long address) { struct vm_area_struct *vma = NULL; struct task_struct *tsk = current; struct mm_struct *mm = tsk->mm; siginfo_t info; int fault, ret; - int write = cause_code & (1 << ECR_C_BIT_DTLB_ST_MISS); /* ST/EX */ + int write = regs->ecr_cause & ECR_C_PROTV_STORE; /* ST/EX */ unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE | (write ? FAULT_FLAG_WRITE : 0); @@ -111,7 +110,8 @@ good_area: /* Handle protection violation, execute on heap or stack */ - if (cause_code == ((ECR_V_PROTV << 16) | ECR_C_PROTV_INST_FETCH)) + if ((regs->ecr_vec == ECR_V_PROTV) && + (regs->ecr_cause == ECR_C_PROTV_INST_FETCH)) goto bad_area; if (write) { @@ -178,7 +178,6 @@ bad_area_nosemaphore: /* User mode accesses just cause a SIGSEGV */ if (user_mode(regs)) { tsk->thread.fault_address = address; - tsk->thread.cause_code = cause_code; info.si_signo = SIGSEGV; info.si_errno = 0; /* info.si_code has been set above */ @@ -199,7 +198,7 @@ no_context: if (fixup_exception(regs)) return; - die("Oops", regs, address, cause_code); + die("Oops", regs, address); out_of_memory: if (is_global_init(tsk)) { @@ -220,7 +219,6 @@ do_sigbus: goto no_context; tsk->thread.fault_address = address; - tsk->thread.cause_code = cause_code; info.si_signo = SIGBUS; info.si_errno = 0; info.si_code = BUS_ADRERR; diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S index bd8bc90f61d..8d61fdf7a43 100644 --- a/arch/arc/mm/tlbex.S +++ b/arch/arc/mm/tlbex.S @@ -382,7 +382,6 @@ do_slow_path_pf: ; ------- setup args for Linux Page fault Hanlder --------- mov_s r0, sp lr r1, [efa] - lr r2, [ecr] ; We don't want exceptions to be disabled while the fault is handled. ; Now that we have saved the context we return from exception hence -- cgit v1.2.3-70-g09d2 From 609838cfed972d49a65aac7923a9ff5cbe482e30 Mon Sep 17 00:00:00 2001 From: Johannes Weiner Date: Mon, 8 Jul 2013 15:59:50 -0700 Subject: mm: invoke oom-killer from remaining unconverted page fault handlers A few remaining architectures directly kill the page faulting task in an out of memory situation. This is usually not a good idea since that task might not even use a significant amount of memory and so may not be the optimal victim to resolve the situation. Since 2.6.29's 1c0fe6e ("mm: invoke oom-killer from page fault") there is a hook that architecture page fault handlers are supposed to call to invoke the OOM killer and let it pick the right task to kill. Convert the remaining architectures over to this hook. To have the previous behavior of simply taking out the faulting task the vm.oom_kill_allocating_task sysctl can be set to 1. Signed-off-by: Johannes Weiner Reviewed-by: Michal Hocko Cc: KAMEZAWA Hiroyuki Acked-by: David Rientjes Acked-by: Vineet Gupta [arch/arc bits] Cc: James Hogan Cc: David Howells Cc: Jonas Bonn Cc: Chen Liqin Cc: Lennox Wu Cc: Chris Metcalf Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/arc/mm/fault.c | 6 ++++-- arch/metag/mm/fault.c | 6 ++++-- arch/mn10300/mm/fault.c | 7 ++++--- arch/openrisc/mm/fault.c | 8 ++++---- arch/score/mm/fault.c | 8 ++++---- arch/tile/mm/fault.c | 8 ++++---- 6 files changed, 24 insertions(+), 19 deletions(-) (limited to 'arch/arc/mm/fault.c') diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index 318164cabdf..0fd1f0d515f 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -207,8 +207,10 @@ out_of_memory: } up_read(&mm->mmap_sem); - if (user_mode(regs)) - do_group_exit(SIGKILL); /* This will never return */ + if (user_mode(regs)) { + pagefault_out_of_memory(); + return; + } goto no_context; diff --git a/arch/metag/mm/fault.c b/arch/metag/mm/fault.c index 2c75bf7357c..8fddf46e6c6 100644 --- a/arch/metag/mm/fault.c +++ b/arch/metag/mm/fault.c @@ -224,8 +224,10 @@ do_sigbus: */ out_of_memory: up_read(&mm->mmap_sem); - if (user_mode(regs)) - do_group_exit(SIGKILL); + if (user_mode(regs)) { + pagefault_out_of_memory(); + return 1; + } no_context: /* Are we prepared to handle this kernel fault? */ diff --git a/arch/mn10300/mm/fault.c b/arch/mn10300/mm/fault.c index d48a84fd7fa..8a2e6ded9a4 100644 --- a/arch/mn10300/mm/fault.c +++ b/arch/mn10300/mm/fault.c @@ -345,9 +345,10 @@ no_context: */ out_of_memory: up_read(&mm->mmap_sem); - printk(KERN_ALERT "VM: killing process %s\n", tsk->comm); - if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR) - do_exit(SIGKILL); + if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR) { + pagefault_out_of_memory(); + return; + } goto no_context; do_sigbus: diff --git a/arch/openrisc/mm/fault.c b/arch/openrisc/mm/fault.c index e2bfafce66c..4a41f8493ab 100644 --- a/arch/openrisc/mm/fault.c +++ b/arch/openrisc/mm/fault.c @@ -267,10 +267,10 @@ out_of_memory: __asm__ __volatile__("l.nop 1"); up_read(&mm->mmap_sem); - printk("VM: killing process %s\n", tsk->comm); - if (user_mode(regs)) - do_exit(SIGKILL); - goto no_context; + if (!user_mode(regs)) + goto no_context; + pagefault_out_of_memory(); + return; do_sigbus: up_read(&mm->mmap_sem); diff --git a/arch/score/mm/fault.c b/arch/score/mm/fault.c index 47b600e4b2c..6b18fb0189a 100644 --- a/arch/score/mm/fault.c +++ b/arch/score/mm/fault.c @@ -172,10 +172,10 @@ out_of_memory: down_read(&mm->mmap_sem); goto survive; } - printk("VM: killing process %s\n", tsk->comm); - if (user_mode(regs)) - do_group_exit(SIGKILL); - goto no_context; + if (!user_mode(regs)) + goto no_context; + pagefault_out_of_memory(); + return; do_sigbus: up_read(&mm->mmap_sem); diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c index 3d2b81c163a..f7f99f90cbe 100644 --- a/arch/tile/mm/fault.c +++ b/arch/tile/mm/fault.c @@ -573,10 +573,10 @@ out_of_memory: down_read(&mm->mmap_sem); goto survive; } - pr_alert("VM: killing process %s\n", tsk->comm); - if (!is_kernel_mode) - do_group_exit(SIGKILL); - goto no_context; + if (is_kernel_mode) + goto no_context; + pagefault_out_of_memory(); + return 0; do_sigbus: up_read(&mm->mmap_sem); -- cgit v1.2.3-70-g09d2