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authorLinus Torvalds <torvalds@linux-foundation.org>2009-06-12 18:18:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-12 18:18:05 -0700
commitd645727bdc2aed8e2e0e9496248f735481b5049a (patch)
tree079fa3cf369dbf0dc0663fe1b0a62460c522a8e9
parentcd166bd0dde265a97dd9aa8e3451a2646d96d04b (diff)
parent310d6b671588dd7695cbc0d09d02e41d94a42bed (diff)
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (30 commits) [S390] wire up sys_perf_counter_open [S390] wire up sys_rt_tgsigqueueinfo [S390] ftrace: add system call tracer support [S390] ftrace: add function graph tracer support [S390] ftrace: add function trace mcount test support [S390] ftrace: add dynamic ftrace support [S390] kprobes: use probe_kernel_write [S390] maccess: arch specific probe_kernel_write() implementation [S390] maccess: add weak attribute to probe_kernel_write [S390] profile_tick called twice [S390] dasd: forward internal errors to dasd_sleep_on caller [S390] dasd: sync after async probe [S390] dasd: check_characteristics cleanup [S390] dasd: no High Performance FICON in 31-bit mode [S390] dcssblk: revert devt conversion [S390] qdio: fix access beyond ARRAY_SIZE of irq_ptr->{in,out}put_qs [S390] vmalloc: add vmalloc kernel parameter support [S390] uaccess: use might_fault() instead of might_sleep() [S390] 3270: lock dependency fixes [S390] 3270: do not register with tty_register_device ...
-rw-r--r--arch/s390/Kconfig23
-rw-r--r--arch/s390/include/asm/compat.h19
-rw-r--r--arch/s390/include/asm/cpu.h32
-rw-r--r--arch/s390/include/asm/cputime.h19
-rw-r--r--arch/s390/include/asm/ftrace.h21
-rw-r--r--arch/s390/include/asm/lowcore.h9
-rw-r--r--arch/s390/include/asm/pgtable.h7
-rw-r--r--arch/s390/include/asm/seccomp.h16
-rw-r--r--arch/s390/include/asm/spinlock.h19
-rw-r--r--arch/s390/include/asm/syscall.h1
-rw-r--r--arch/s390/include/asm/thread_info.h12
-rw-r--r--arch/s390/include/asm/uaccess.h16
-rw-r--r--arch/s390/include/asm/unistd.h4
-rw-r--r--arch/s390/kernel/Makefile7
-rw-r--r--arch/s390/kernel/compat_wrapper.S17
-rw-r--r--arch/s390/kernel/early.c4
-rw-r--r--arch/s390/kernel/entry.S7
-rw-r--r--arch/s390/kernel/entry64.S7
-rw-r--r--arch/s390/kernel/ftrace.c260
-rw-r--r--arch/s390/kernel/head.S65
-rw-r--r--arch/s390/kernel/kprobes.c31
-rw-r--r--arch/s390/kernel/mcount.S212
-rw-r--r--arch/s390/kernel/nmi.c2
-rw-r--r--arch/s390/kernel/process.c3
-rw-r--r--arch/s390/kernel/ptrace.c23
-rw-r--r--arch/s390/kernel/s390_ext.c5
-rw-r--r--arch/s390/kernel/sclp.S327
-rw-r--r--arch/s390/kernel/setup.c2
-rw-r--r--arch/s390/kernel/signal.c3
-rw-r--r--arch/s390/kernel/smp.c3
-rw-r--r--arch/s390/kernel/syscalls.S2
-rw-r--r--arch/s390/kernel/time.c9
-rw-r--r--arch/s390/kernel/vdso.c19
-rw-r--r--arch/s390/kernel/vmlinux.lds.S1
-rw-r--r--arch/s390/kernel/vtime.c2
-rw-r--r--arch/s390/kvm/kvm-s390.c2
-rw-r--r--arch/s390/lib/spinlock.c40
-rw-r--r--arch/s390/mm/Makefile2
-rw-r--r--arch/s390/mm/fault.c3
-rw-r--r--arch/s390/mm/maccess.c61
-rw-r--r--arch/s390/mm/mmap.c11
-rw-r--r--arch/s390/mm/pgtable.c16
-rw-r--r--drivers/s390/block/dasd.c34
-rw-r--r--drivers/s390/block/dasd_diag.c1
-rw-r--r--drivers/s390/block/dasd_eckd.c44
-rw-r--r--drivers/s390/block/dasd_fba.c22
-rw-r--r--drivers/s390/block/dasd_int.h3
-rw-r--r--drivers/s390/block/dcssblk.c4
-rw-r--r--drivers/s390/char/con3270.c38
-rw-r--r--drivers/s390/char/tty3270.c57
-rw-r--r--drivers/s390/cio/cio.c6
-rw-r--r--drivers/s390/cio/device_ops.c24
-rw-r--r--drivers/s390/cio/qdio_main.c46
-rw-r--r--drivers/s390/cio/qdio_perf.c12
-rw-r--r--drivers/s390/cio/qdio_perf.h10
-rw-r--r--mm/maccess.c2
-rwxr-xr-xscripts/recordmcount.pl13
57 files changed, 1322 insertions, 338 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 2eca5fe0e75..99dc3ded6b4 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -82,6 +82,11 @@ config S390
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_SYSCALL_WRAPPERS
select HAVE_FUNCTION_TRACER
+ select HAVE_FUNCTION_TRACE_MCOUNT_TEST
+ select HAVE_FTRACE_MCOUNT_RECORD
+ select HAVE_FTRACE_SYSCALLS
+ select HAVE_DYNAMIC_FTRACE
+ select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_DEFAULT_NO_SPIN_MUTEXES
select HAVE_OPROFILE
select HAVE_KPROBES
@@ -567,6 +572,24 @@ bool "s390 guest support for KVM (EXPERIMENTAL)"
the KVM hypervisor. This will add detection for KVM as well as a
virtio transport. If KVM is detected, the virtio console will be
the default console.
+
+config SECCOMP
+ bool "Enable seccomp to safely compute untrusted bytecode"
+ depends on PROC_FS
+ default y
+ help
+ This kernel feature is useful for number crunching applications
+ that may need to compute untrusted bytecode during their
+ execution. By using pipes or other transports made available to
+ the process as file descriptors supporting the read/write
+ syscalls, it's possible to isolate those applications in
+ their own address space using seccomp. Once seccomp is
+ enabled via /proc/<pid>/seccomp, it cannot be disabled
+ and the task is only allowed to execute a few safe syscalls
+ defined by each seccomp mode.
+
+ If unsure, say Y.
+
endmenu
source "net/Kconfig"
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index de065b32381..01a08020bc0 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -5,6 +5,7 @@
*/
#include <linux/types.h>
#include <linux/sched.h>
+#include <linux/thread_info.h>
#define PSW32_MASK_PER 0x40000000UL
#define PSW32_MASK_DAT 0x04000000UL
@@ -163,12 +164,28 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
return (u32)(unsigned long)uptr;
}
+#ifdef CONFIG_COMPAT
+
+static inline int is_compat_task(void)
+{
+ return test_thread_flag(TIF_31BIT);
+}
+
+#else
+
+static inline int is_compat_task(void)
+{
+ return 0;
+}
+
+#endif
+
static inline void __user *compat_alloc_user_space(long len)
{
unsigned long stack;
stack = KSTK_ESP(current);
- if (test_thread_flag(TIF_31BIT))
+ if (is_compat_task())
stack &= 0x7fffffffUL;
return (void __user *) (stack - len);
}
diff --git a/arch/s390/include/asm/cpu.h b/arch/s390/include/asm/cpu.h
deleted file mode 100644
index d60a2eefb17..00000000000
--- a/arch/s390/include/asm/cpu.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * include/asm-s390/cpu.h
- *
- * Copyright IBM Corp. 2007
- * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
- */
-
-#ifndef _ASM_S390_CPU_H_
-#define _ASM_S390_CPU_H_
-
-#include <linux/types.h>
-#include <linux/percpu.h>
-#include <linux/spinlock.h>
-
-struct s390_idle_data {
- spinlock_t lock;
- unsigned long long idle_count;
- unsigned long long idle_enter;
- unsigned long long idle_time;
-};
-
-DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
-
-void vtime_start_cpu(void);
-
-static inline void s390_idle_check(void)
-{
- if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
- vtime_start_cpu();
-}
-
-#endif /* _ASM_S390_CPU_H_ */
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index 941384fbd39..ec917d42ee6 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -9,6 +9,9 @@
#ifndef _S390_CPUTIME_H
#define _S390_CPUTIME_H
+#include <linux/types.h>
+#include <linux/percpu.h>
+#include <linux/spinlock.h>
#include <asm/div64.h>
/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
@@ -174,8 +177,24 @@ cputime64_to_clock_t(cputime64_t cputime)
return __div(cputime, 4096000000ULL / USER_HZ);
}
+struct s390_idle_data {
+ spinlock_t lock;
+ unsigned long long idle_count;
+ unsigned long long idle_enter;
+ unsigned long long idle_time;
+};
+
+DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
+
+void vtime_start_cpu(void);
cputime64_t s390_get_idle_time(int cpu);
#define arch_idle_time(cpu) s390_get_idle_time(cpu)
+static inline void s390_idle_check(void)
+{
+ if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
+ vtime_start_cpu();
+}
+
#endif /* _S390_CPUTIME_H */
diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h
index 5a5bc75e19d..96c14a9102b 100644
--- a/arch/s390/include/asm/ftrace.h
+++ b/arch/s390/include/asm/ftrace.h
@@ -2,7 +2,28 @@
#define _ASM_S390_FTRACE_H
#ifndef __ASSEMBLY__
+
extern void _mcount(void);
+extern unsigned long ftrace_dyn_func;
+
+struct dyn_arch_ftrace { };
+
+#define MCOUNT_ADDR ((long)_mcount)
+
+#ifdef CONFIG_64BIT
+#define MCOUNT_OFFSET_RET 18
+#define MCOUNT_INSN_SIZE 24
+#define MCOUNT_OFFSET 14
+#else
+#define MCOUNT_OFFSET_RET 26
+#define MCOUNT_INSN_SIZE 30
+#define MCOUNT_OFFSET 8
#endif
+static inline unsigned long ftrace_call_adjust(unsigned long addr)
+{
+ return addr - MCOUNT_OFFSET;
+}
+
+#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_FTRACE_H */
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index 3aeca492b14..5046ad6b7a6 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -30,6 +30,7 @@
#define __LC_SUBCHANNEL_NR 0x00ba
#define __LC_IO_INT_PARM 0x00bc
#define __LC_IO_INT_WORD 0x00c0
+#define __LC_STFL_FAC_LIST 0x00c8
#define __LC_MCCK_CODE 0x00e8
#define __LC_DUMP_REIPL 0x0e00
@@ -67,6 +68,7 @@
#define __LC_CPUID 0x02b0
#define __LC_INT_CLOCK 0x02c8
#define __LC_MACHINE_FLAGS 0x02d8
+#define __LC_FTRACE_FUNC 0x02dc
#define __LC_IRB 0x0300
#define __LC_PFAULT_INTPARM 0x0080
#define __LC_CPU_TIMER_SAVE_AREA 0x00d8
@@ -112,6 +114,7 @@
#define __LC_INT_CLOCK 0x0340
#define __LC_VDSO_PER_CPU 0x0350
#define __LC_MACHINE_FLAGS 0x0358
+#define __LC_FTRACE_FUNC 0x0360
#define __LC_IRB 0x0380
#define __LC_PASTE 0x03c0
#define __LC_PFAULT_INTPARM 0x11b8
@@ -280,7 +283,8 @@ struct _lowcore
__u64 int_clock; /* 0x02c8 */
__u64 clock_comparator; /* 0x02d0 */
__u32 machine_flags; /* 0x02d8 */
- __u8 pad_0x02dc[0x0300-0x02dc]; /* 0x02dc */
+ __u32 ftrace_func; /* 0x02dc */
+ __u8 pad_0x02f0[0x0300-0x02f0]; /* 0x02f0 */
/* Interrupt response block */
__u8 irb[64]; /* 0x0300 */
@@ -385,7 +389,8 @@ struct _lowcore
__u64 clock_comparator; /* 0x0348 */
__u64 vdso_per_cpu_data; /* 0x0350 */
__u64 machine_flags; /* 0x0358 */
- __u8 pad_0x0360[0x0380-0x0360]; /* 0x0360 */
+ __u64 ftrace_func; /* 0x0360 */
+ __u8 pad_0x0368[0x0380-0x0368]; /* 0x0368 */
/* Interrupt response block. */
__u8 irb[64]; /* 0x0380 */
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 5caddd4f7be..60a7b1a1702 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -112,12 +112,15 @@ extern char empty_zero_page[PAGE_SIZE];
* effect, this also makes sure that 64 bit module code cannot be used
* as system call address.
*/
+
+extern unsigned long VMALLOC_START;
+
#ifndef __s390x__
-#define VMALLOC_START 0x78000000UL
+#define VMALLOC_SIZE (96UL << 20)
#define VMALLOC_END 0x7e000000UL
#define VMEM_MAP_END 0x80000000UL
#else /* __s390x__ */
-#define VMALLOC_START 0x3e000000000UL
+#define VMALLOC_SIZE (1UL << 30)
#define VMALLOC_END 0x3e040000000UL
#define VMEM_MAP_END 0x40000000000UL
#endif /* __s390x__ */
diff --git a/arch/s390/include/asm/seccomp.h b/arch/s390/include/asm/seccomp.h
new file mode 100644
index 00000000000..781a9cf9b00
--- /dev/null
+++ b/arch/s390/include/asm/seccomp.h
@@ -0,0 +1,16 @@
+#ifndef _ASM_S390_SECCOMP_H
+#define _ASM_S390_SECCOMP_H
+
+#include <linux/unistd.h>
+
+#define __NR_seccomp_read __NR_read
+#define __NR_seccomp_write __NR_write
+#define __NR_seccomp_exit __NR_exit
+#define __NR_seccomp_sigreturn __NR_sigreturn
+
+#define __NR_seccomp_read_32 __NR_read
+#define __NR_seccomp_write_32 __NR_write
+#define __NR_seccomp_exit_32 __NR_exit
+#define __NR_seccomp_sigreturn_32 __NR_sigreturn
+
+#endif /* _ASM_S390_SECCOMP_H */
diff --git a/arch/s390/include/asm/spinlock.h b/arch/s390/include/asm/spinlock.h
index f3861b09ebb..c9af0d19c7a 100644
--- a/arch/s390/include/asm/spinlock.h
+++ b/arch/s390/include/asm/spinlock.h
@@ -122,8 +122,10 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lp)
#define __raw_write_can_lock(x) ((x)->lock == 0)
extern void _raw_read_lock_wait(raw_rwlock_t *lp);
+extern void _raw_read_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
extern int _raw_read_trylock_retry(raw_rwlock_t *lp);
extern void _raw_write_lock_wait(raw_rwlock_t *lp);
+extern void _raw_write_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
extern int _raw_write_trylock_retry(raw_rwlock_t *lp);
static inline void __raw_read_lock(raw_rwlock_t *rw)
@@ -134,6 +136,14 @@ static inline void __raw_read_lock(raw_rwlock_t *rw)
_raw_read_lock_wait(rw);
}
+static inline void __raw_read_lock_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+ unsigned int old;
+ old = rw->lock & 0x7fffffffU;
+ if (_raw_compare_and_swap(&rw->lock, old, old + 1) != old)
+ _raw_read_lock_wait_flags(rw, flags);
+}
+
static inline void __raw_read_unlock(raw_rwlock_t *rw)
{
unsigned int old, cmp;
@@ -151,6 +161,12 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
_raw_write_lock_wait(rw);
}
+static inline void __raw_write_lock_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+ if (unlikely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) != 0))
+ _raw_write_lock_wait_flags(rw, flags);
+}
+
static inline void __raw_write_unlock(raw_rwlock_t *rw)
{
_raw_compare_and_swap(&rw->lock, 0x80000000, 0);
@@ -172,9 +188,6 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
return _raw_write_trylock_retry(rw);
}
-#define __raw_read_lock_flags(lock, flags) __raw_read_lock(lock)
-#define __raw_write_lock_flags(lock, flags) __raw_write_lock(lock)
-
#define _raw_read_relax(lock) cpu_relax()
#define _raw_write_relax(lock) cpu_relax()
diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h
index 2429b87eb28..e0a73d3eb83 100644
--- a/arch/s390/include/asm/syscall.h
+++ b/arch/s390/include/asm/syscall.h
@@ -12,6 +12,7 @@
#ifndef _ASM_SYSCALL_H
#define _ASM_SYSCALL_H 1
+#include <linux/sched.h>
#include <asm/ptrace.h>
static inline long syscall_get_nr(struct task_struct *task,
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 461f2abd2e6..925bcc64903 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -83,14 +83,16 @@ static inline struct thread_info *current_thread_info(void)
/*
* thread information flags bit numbers
*/
-#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_RESTART_SVC 4 /* restart svc with new svc number */
-#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
#define TIF_SINGLE_STEP 6 /* deliver sigtrap on return to user */
#define TIF_MCCK_PENDING 7 /* machine check handling is pending */
+#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
+#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
+#define TIF_SECCOMP 10 /* secure computing */
+#define TIF_SYSCALL_FTRACE 11 /* ftrace syscall instrumentation */
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
@@ -99,15 +101,17 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_RESTORE_SIGMASK 20 /* restore signal mask in do_signal() */
#define TIF_FREEZE 21 /* thread is freezing for suspend */
-#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_RESTART_SVC (1<<TIF_RESTART_SVC)
-#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)
#define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
+#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
+#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
+#define _TIF_SECCOMP (1<<TIF_SECCOMP)
+#define _TIF_SYSCALL_FTRACE (1<<TIF_SYSCALL_FTRACE)
#define _TIF_USEDFPU (1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_31BIT (1<<TIF_31BIT)
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index 0235970278f..8377e91533d 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -131,7 +131,7 @@ static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
#define put_user(x, ptr) \
({ \
- might_sleep(); \
+ might_fault(); \
__put_user(x, ptr); \
})
@@ -180,7 +180,7 @@ extern int __put_user_bad(void) __attribute__((noreturn));
#define get_user(x, ptr) \
({ \
- might_sleep(); \
+ might_fault(); \
__get_user(x, ptr); \
})
@@ -231,7 +231,7 @@ __copy_to_user(void __user *to, const void *from, unsigned long n)
static inline unsigned long __must_check
copy_to_user(void __user *to, const void *from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_WRITE, to, n))
n = __copy_to_user(to, from, n);
return n;
@@ -282,7 +282,7 @@ __copy_from_user(void *to, const void __user *from, unsigned long n)
static inline unsigned long __must_check
copy_from_user(void *to, const void __user *from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_READ, from, n))
n = __copy_from_user(to, from, n);
else
@@ -299,7 +299,7 @@ __copy_in_user(void __user *to, const void __user *from, unsigned long n)
static inline unsigned long __must_check
copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (__access_ok(from,n) && __access_ok(to,n))
n = __copy_in_user(to, from, n);
return n;
@@ -312,7 +312,7 @@ static inline long __must_check
strncpy_from_user(char *dst, const char __user *src, long count)
{
long res = -EFAULT;
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_READ, src, 1))
res = uaccess.strncpy_from_user(count, src, dst);
return res;
@@ -321,7 +321,7 @@ strncpy_from_user(char *dst, const char __user *src, long count)
static inline unsigned long
strnlen_user(const char __user * src, unsigned long n)
{
- might_sleep();
+ might_fault();
return uaccess.strnlen_user(n, src);
}
@@ -354,7 +354,7 @@ __clear_user(void __user *to, unsigned long n)
static inline unsigned long __must_check
clear_user(void __user *to, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_WRITE, to, n))
n = uaccess.clear_user(n, to);
return n;
diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h
index f0f19e6ace6..c80602d7c88 100644
--- a/arch/s390/include/asm/unistd.h
+++ b/arch/s390/include/asm/unistd.h
@@ -267,7 +267,9 @@
#define __NR_epoll_create1 327
#define __NR_preadv 328
#define __NR_pwritev 329
-#define NR_syscalls 330
+#define __NR_rt_tgsigqueueinfo 330
+#define __NR_perf_counter_open 331
+#define NR_syscalls 332
/*
* There are some system calls that are not present on 64 bit, some
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 228e3105ded..c75ed43b1a1 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -3,8 +3,9 @@
#
ifdef CONFIG_FUNCTION_TRACER
-# Do not trace early boot code
+# Don't trace early setup code and tracing code
CFLAGS_REMOVE_early.o = -pg
+CFLAGS_REMOVE_ftrace.o = -pg
endif
#
@@ -22,7 +23,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w
obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o \
processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
s390_ext.o debug.o irq.o ipl.o dis.o diag.o mem_detect.o \
- vdso.o vtime.o sysinfo.o nmi.o
+ vdso.o vtime.o sysinfo.o nmi.o sclp.o
obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o)
obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
@@ -41,6 +42,8 @@ obj-$(CONFIG_COMPAT) += compat_linux.o compat_signal.o \
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
+obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
+obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
# Kexec part
S390_KEXEC_OBJS := machine_kexec.o crash.o
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index fb38af6316b..88a83366819 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1823,3 +1823,20 @@ compat_sys_pwritev_wrapper:
llgfr %r5,%r5 # u32
llgfr %r6,%r6 # u32
jg compat_sys_pwritev # branch to system call
+
+ .globl compat_sys_rt_tgsigqueueinfo_wrapper
+compat_sys_rt_tgsigqueueinfo_wrapper:
+ lgfr %r2,%r2 # compat_pid_t
+ lgfr %r3,%r3 # compat_pid_t
+ lgfr %r4,%r4 # int
+ llgtr %r5,%r5 # struct compat_siginfo *
+ jg compat_sys_rt_tgsigqueueinfo_wrapper # branch to system call
+
+ .globl sys_perf_counter_open_wrapper
+sys_perf_counter_open_wrapper:
+ llgtr %r2,%r2 # const struct perf_counter_attr *
+ lgfr %r3,%r3 # pid_t
+ lgfr %r4,%r4 # int
+ lgfr %r5,%r5 # int
+ llgfr %r6,%r6 # unsigned long
+ jg sys_perf_counter_open # branch to system call
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index cf09948faad..fb263736826 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -11,6 +11,7 @@
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/ctype.h>
+#include <linux/ftrace.h>
#include <linux/lockdep.h>
#include <linux/module.h>
#include <linux/pfn.h>
@@ -410,5 +411,8 @@ void __init startup_init(void)
sclp_facilities_detect();
detect_memory_layout(memory_chunk);
S390_lowcore.machine_flags = machine_flags;
+#ifdef CONFIG_DYNAMIC_FTRACE
+ S390_lowcore.ftrace_func = (unsigned long)ftrace_caller;
+#endif
lockdep_on();
}
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index f3e27593421..c4c80a22bc1 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -53,6 +53,8 @@ _TIF_WORK_SVC = (_TIF_SIGPEN