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-rw-r--r--arch/alpha/mm/fault.c2
-rw-r--r--arch/arm/mm/fault.c2
-rw-r--r--arch/avr32/mm/fault.c3
-rw-r--r--arch/cris/mm/fault.c2
-rw-r--r--arch/frv/mm/fault.c2
-rw-r--r--arch/ia64/mm/fault.c2
-rw-r--r--arch/m32r/mm/fault.c2
-rw-r--r--arch/m68k/mm/fault.c2
-rw-r--r--arch/microblaze/mm/fault.c2
-rw-r--r--arch/mips/mm/fault.c2
-rw-r--r--arch/mn10300/mm/fault.c2
-rw-r--r--arch/parisc/mm/fault.c2
-rw-r--r--arch/powerpc/mm/fault.c2
-rw-r--r--arch/s390/mm/fault.c6
-rw-r--r--arch/score/mm/fault.c2
-rw-r--r--arch/sh/mm/fault_32.c2
-rw-r--r--arch/sparc/mm/fault_32.c2
-rw-r--r--arch/sparc/mm/fault_64.c2
-rw-r--r--arch/tile/mm/fault.c2
-rw-r--r--arch/um/kernel/trap.c2
-rw-r--r--arch/x86/mm/fault.c2
-rw-r--r--arch/xtensa/mm/fault.c2
-rw-r--r--include/linux/sched.h14
-rw-r--r--kernel/fork.c2
24 files changed, 40 insertions, 25 deletions
diff --git a/arch/alpha/mm/fault.c b/arch/alpha/mm/fault.c
index 0ddf6c0296ad..ab6b9d13711b 100644
--- a/arch/alpha/mm/fault.c
+++ b/arch/alpha/mm/fault.c
@@ -106,7 +106,7 @@ do_page_fault(unsigned long address, unsigned long mmcsr,
/* If we're in an interrupt context, or have no user context,
we must not take the fault. */
- if (!mm || in_atomic() || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
#ifdef CONFIG_ALPHA_LARGE_VMALLOC
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 837727be6cd7..eb57b06856fc 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -277,7 +277,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
/*
diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c
index 623a027a6926..155ad8daecf9 100644
--- a/arch/avr32/mm/fault.c
+++ b/arch/avr32/mm/fault.c
@@ -81,8 +81,7 @@ asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs)
* If we're in an interrupt or have no user context, we must
* not take the fault...
*/
- if (in_atomic() || !mm || regs->sr & SYSREG_BIT(GM) ||
- current->pagefault_disabled)
+ if (!mm || regs->sr & SYSREG_BIT(GM) || pagefault_disabled())
goto no_context;
local_irq_enable();
diff --git a/arch/cris/mm/fault.c b/arch/cris/mm/fault.c
index 1c1630ecdca5..886be8e8a70a 100644
--- a/arch/cris/mm/fault.c
+++ b/arch/cris/mm/fault.c
@@ -112,7 +112,7 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
* user context, we must not take the fault.
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/frv/mm/fault.c b/arch/frv/mm/fault.c
index 6372088157d1..e87972c1d7d1 100644
--- a/arch/frv/mm/fault.c
+++ b/arch/frv/mm/fault.c
@@ -78,7 +78,7 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr0, unsigned long ear
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 721dbb9caebc..8ca850e9257c 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -88,7 +88,7 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
/*
* If we're in an interrupt or have no user context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
#ifdef CONFIG_VIRTUAL_MEM_MAP
diff --git a/arch/m32r/mm/fault.c b/arch/m32r/mm/fault.c
index 1eec8af7a01d..69450568dbf6 100644
--- a/arch/m32r/mm/fault.c
+++ b/arch/m32r/mm/fault.c
@@ -114,7 +114,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code,
* If we're in an interrupt or have no user context or are running in an
* atomic region then we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto bad_area_nosemaphore;
/* When running in the kernel we expect faults to occur only to
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index 7a4cc68913bc..46b8ccea5c76 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -84,7 +84,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index 621ad49fbcb5..a438434ea4a7 100644
--- a/arch/microblaze/mm/fault.c
+++ b/arch/microblaze/mm/fault.c
@@ -106,7 +106,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
if ((error_code & 0x13) == 0x13 || (error_code & 0x11) == 0x11)
is_write = 0;
- if (unlikely(in_atomic() || !mm || current->pagefault_disabled)) {
+ if (unlikely(!mm || pagefault_disabled())) {
if (kernel_mode(regs))
goto bad_area_nosemaphore;
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 3468e691ac16..39a31800dcdf 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -89,7 +89,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, unsigned long writ
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto bad_area_nosemaphore;
retry:
diff --git a/arch/mn10300/mm/fault.c b/arch/mn10300/mm/fault.c
index ff5acf58e088..5d9e10f8ffe6 100644
--- a/arch/mn10300/mm/fault.c
+++ b/arch/mn10300/mm/fault.c
@@ -167,7 +167,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 09ecc8a77407..df22f39fb545 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -176,7 +176,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
unsigned long acc_type;
int fault;
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 6642dff5cb90..7bd8f27ccd1e 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -261,7 +261,7 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address,
if (!arch_irq_disabled_regs(regs))
local_irq_enable();
- if (in_atomic() || mm == NULL || current->pagefault_disabled) {
+ if (!mm || pagefault_disabled()) {
if (!user_mode(regs))
return SIGSEGV;
/* in_atomic() in user mode is really bad,
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 6c0edb8d2329..a5c14564ac40 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -283,8 +283,8 @@ static inline int do_exception(struct pt_regs *regs, int access)
* user context.
*/
fault = VM_FAULT_BADCONTEXT;
- if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm ||
- tsk->pagefault_disabled))
+ if (unlikely(!user_space_fault(trans_exc_code) ||
+ !mm || pagefault_disabled()))
goto out;
address = trans_exc_code & __FAIL_ADDR_MASK;
@@ -417,7 +417,7 @@ void __kprobes do_asce_exception(struct pt_regs *regs)
trans_exc_code = regs->int_parm_long;
if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm ||
- current->pagefault_disabled))
+ pagefault_disabled()))
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/score/mm/fault.c b/arch/score/mm/fault.c
index 4c128245fa2d..59fccbe9777b 100644
--- a/arch/score/mm/fault.c
+++ b/arch/score/mm/fault.c
@@ -72,7 +72,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto bad_area_nosemaphore;
down_read(&mm->mmap_sem);
diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c
index bc45654c9c64..4af10d68cfa5 100644
--- a/arch/sh/mm/fault_32.c
+++ b/arch/sh/mm/fault_32.c
@@ -166,7 +166,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
* If we're in an interrupt, have no user context or are running
* in an atomic region then we must not take the fault:
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index 39afeb9b5e22..4473617fc5ec 100644
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -246,7 +246,7 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto no_context;
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index 9d691a5ca014..f6572f87d07e 100644
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -322,7 +322,7 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_enabled)
+ if (!mm || pagefault_disabled())
goto intr_or_no_mm;
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
index f683aadf75bd..3e85178e5b5f 100644
--- a/arch/tile/mm/fault.c
+++ b/arch/tile/mm/fault.c
@@ -355,7 +355,7 @@ static int handle_page_fault(struct pt_regs *regs,
* If we're in an interrupt, have no user context or are running in an
* atomic region then we must not take the fault.
*/
- if (in_atomic() || !mm || current->pagefault_disabled) {
+ if (!mm || pagefault_disabled()) {
vma = NULL; /* happy compiler */
goto bad_area_nosemaphore;
}
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index a28340023e13..78780693eb6d 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -37,7 +37,7 @@ int handle_page_fault(unsigned long address, unsigned long ip,
* If the fault was during atomic operation, don't take the fault, just
* fail.
*/
- if (in_atomic() || !mm || current->pagefault_disabled)
+ if (!mm || pagefault_disabled())
goto out_nosemaphore;
down_read(&mm->mmap_sem);
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index bb891f2ba5f5..9d57357c2e1d 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1094,7 +1094,7 @@ do_page_fault(struct pt_regs *regs, unsigned long error_code)
* If we're in an interrupt, have no user context or are running
* in an atomic region then we must not take the fault:
*/
- if (unlikely(in_atomic() || !mm || current->pagefault_disabled)) {
+ if (unlikely(!mm || pagefault_disabled())) {
bad_area_nosemaphore(regs, error_code, address);
return;
}
diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c
index cc58b7c32786..93d33ee39b21 100644
--- a/arch/xtensa/mm/fault.c
+++ b/arch/xtensa/mm/fault.c
@@ -56,7 +56,7 @@ void do_page_fault(struct pt_regs *regs)
/* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm || current->pagefault_disabled) {
+ if (!mm || pagefault_disabled()) {
bad_page_fault(regs, address, SIGSEGV);
return;
}
diff --git a/include/linux/sched.h b/include/linux/sched.h
index f0ee37ffc178..f14b965ec681 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -90,6 +90,7 @@ struct sched_param {
#include <linux/latencytop.h>
#include <linux/cred.h>
#include <linux/llist.h>
+#include <linux/hardirq.h>
#include <asm/processor.h>
@@ -1478,7 +1479,9 @@ struct task_struct {
/* mutex deadlock detection */
struct mutex_waiter *blocked_on;
#endif
+#ifdef CONFIG_PREEMPT_RT_FULL
int pagefault_disabled;
+#endif
#ifdef CONFIG_TRACE_IRQFLAGS
unsigned int irq_events;
unsigned long hardirq_enable_ip;
@@ -1628,6 +1631,17 @@ struct task_struct {
/* Future-safe accessor for struct task_struct's cpus_allowed. */
#define tsk_cpus_allowed(tsk) (&(tsk)->cpus_allowed)
+#ifdef CONFIG_PREEMPT_RT_FULL
+static inline bool cur_pf_disabled(void) { return current->pagefault_disabled; }
+#else
+static inline bool cur_pf_disabled(void) { return false; }
+#endif
+
+static inline bool pagefault_disabled(void)
+{
+ return in_atomic() || cur_pf_disabled();
+}
+
/*
* Priority of a process goes from 0..MAX_PRIO-1, valid RT
* priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
diff --git a/kernel/fork.c b/kernel/fork.c
index 7d28c2faf5de..ae89fcab6e26 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1263,7 +1263,9 @@ static struct task_struct *copy_process(unsigned long clone_flags,
p->hardirq_context = 0;
p->softirq_context = 0;
#endif
+#ifdef CONFIG_PREEMPT_RT_FULL
p->pagefault_disabled = 0;
+#endif
#ifdef CONFIG_LOCKDEP
p->lockdep_depth = 0; /* no locks held yet */
p->curr_chain_key = 0;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-15 12:15:46 +0000