Remove __ASSUME_POSIX_CPU_TIMERS.

8 files changed, 54 insertions, 323 deletions

diff --git a/ChangeLog b/ChangeLog
index bd896ba6cb..bb5de85029 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,26 @@
+2012-09-01  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/kernel-features.h
+	(__ASSUME_POSIX_CPU_TIMERS): Remove.
+	* sysdeps/unix/sysv/linux/clock_getcpuclockid.c
+	[__NR_clock_getres]: Make code unconditional.
+	[!__ASSUME_POSIX_CPU_TIMERS]: Remoce conditional code.
+	(clock_getcpuclockid): Remove code left unreachable by removal of
+	conditionals.
+	* sysdeps/unix/sysv/linux/clock_getres.c [__NR_clock_getres]: Make
+	code unconditional.
+	[__ASSUME_POSIX_CPU_TIMERS]: Likewise.
+	[!__ASSUME_POSIX_CPU_TIMERS]: Remove conditional code.
+	* sysdeps/unix/sysv/linux/clock_gettime.c [__NR_clock_gettime]:
+	Make code unconditional.
+	[__ASSUME_POSIX_CPU_TIMERS]: Likewise.
+	[!__ASSUME_POSIX_CPU_TIMERS]: Remove conditional code.
+	* sysdeps/unix/sysv/linux/clock_settime.c
+	[__ASSUME_POSIX_CPU_TIMERS <= 0 && __NR_clock_settime]: Remove
+	conditional code.
+	[__ASSUME_POSIX_CPU_TIMERS]: Make code unconditional.
+	[!__ASSUME_POSIX_CPU_TIMERS]: Remove conditional code.
+
 2012-08-29  H.J. Lu  <hongjiu.lu@intel.com>
 
 	[BZ #14476]
diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index f59c3d720e..f4b7ff358f 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,3 +1,11 @@
+2012-09-01  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/pthread_getcpuclockid.c
+	[!__ASSUME_POSIX_CPU_TIMERS]: Remove conditional code.
+	[__NR_clock_getres]: Make code unconditional.
+	(pthread_getcpuclockid): Remove code left unreachable by removal
+	of conditionals.
+
 2012-08-31  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #14532]
diff --git a/nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c b/nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c
index 7d7287b4b8..368f2c4605 100644
--- a/nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c
+++ b/nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c
@@ -24,10 +24,6 @@
 #include <kernel-posix-cpu-timers.h>
 
 
-#if !(__ASSUME_POSIX_CPU_TIMERS > 0)
-int __libc_missing_posix_cpu_timers attribute_hidden;
-#endif
-
 int
 pthread_getcpuclockid (threadid, clockid)
      pthread_t threadid;
@@ -40,55 +36,10 @@ pthread_getcpuclockid (threadid, clockid)
     /* Not a valid thread handle.  */
     return ESRCH;
 
-#ifdef __NR_clock_getres
-  /* The clockid_t value is a simple computation from the TID.
-     But we do a clock_getres call to validate it if we aren't
-     yet sure we have the kernel support.  */
+  /* The clockid_t value is a simple computation from the TID.  */
 
   const clockid_t tidclock = MAKE_THREAD_CPUCLOCK (pd->tid, CPUCLOCK_SCHED);
 
-# if !(__ASSUME_POSIX_CPU_TIMERS > 0)
-  if (!__libc_missing_posix_cpu_timers)
-    {
-      INTERNAL_SYSCALL_DECL (err);
-      int r = INTERNAL_SYSCALL (clock_getres, err, 2, tidclock, NULL);
-      if (!INTERNAL_SYSCALL_ERROR_P (r, err))
-# endif
-	{
-	  *clockid = tidclock;
-	  return 0;
-	}
-
-# if !(__ASSUME_POSIX_CPU_TIMERS > 0)
-      if (INTERNAL_SYSCALL_ERRNO (r, err) == EINVAL)
-	{
-	  /* The kernel doesn't support these clocks at all.  */
-	  __libc_missing_posix_cpu_timers = 1;
-	}
-      else
-	return INTERNAL_SYSCALL_ERRNO (r, err);
-    }
-# endif
-#endif
-
-#ifdef CLOCK_THREAD_CPUTIME_ID
-  /* We need to store the thread ID in the CLOCKID variable together
-     with a number identifying the clock.  We reserve the low 3 bits
-     for the clock ID and the rest for the thread ID.  This is
-     problematic if the thread ID is too large.  But 29 bits should be
-     fine.
-
-     If some day more clock IDs are needed the ID part can be
-     enlarged.  The IDs are entirely internal.  */
-  if (pd->tid >= 1 << (8 * sizeof (*clockid) - CLOCK_IDFIELD_SIZE))
-    return ERANGE;
-
-  /* Store the number.  */
-  *clockid = CLOCK_THREAD_CPUTIME_ID | (pd->tid << CLOCK_IDFIELD_SIZE);
-
+  *clockid = tidclock;
   return 0;
-#else
-  /* We don't have a timer for that.  */
-  return ENOENT;
-#endif
 }
diff --git a/sysdeps/unix/sysv/linux/clock_getcpuclockid.c b/sysdeps/unix/sysv/linux/clock_getcpuclockid.c
index 1cfdf3489b..8700354a92 100644
--- a/sysdeps/unix/sysv/linux/clock_getcpuclockid.c
+++ b/sysdeps/unix/sysv/linux/clock_getcpuclockid.c
@@ -29,60 +29,24 @@
 int
 clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
 {
-#ifdef __NR_clock_getres
   /* The clockid_t value is a simple computation from the PID.
      But we do a clock_getres call to validate it.  */
 
   const clockid_t pidclock = MAKE_PROCESS_CPUCLOCK (pid, CPUCLOCK_SCHED);
 
-# if !(__ASSUME_POSIX_CPU_TIMERS > 0)
-  extern int __libc_missing_posix_cpu_timers attribute_hidden;
-  if (!__libc_missing_posix_cpu_timers)
-# endif
+  INTERNAL_SYSCALL_DECL (err);
+  int r = INTERNAL_SYSCALL (clock_getres, err, 2, pidclock, NULL);
+  if (!INTERNAL_SYSCALL_ERROR_P (r, err))
     {
-      INTERNAL_SYSCALL_DECL (err);
-      int r = INTERNAL_SYSCALL (clock_getres, err, 2, pidclock, NULL);
-      if (!INTERNAL_SYSCALL_ERROR_P (r, err))
-	{
-	  *clock_id = pidclock;
-	  return 0;
-	}
-
-      if (INTERNAL_SYSCALL_ERRNO (r, err) == EINVAL)
-	{
-# if !(__ASSUME_POSIX_CPU_TIMERS > 0)
-	  if (pidclock == MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED)
-	      || INTERNAL_SYSCALL_ERROR_P (INTERNAL_SYSCALL
-					   (clock_getres, err, 2,
-					    MAKE_PROCESS_CPUCLOCK
-					    (0, CPUCLOCK_SCHED), NULL),
-					   err))
-	    /* The kernel doesn't support these clocks at all.  */
-	    __libc_missing_posix_cpu_timers = 1;
-	  else
-# endif
-	    /* The clock_getres system call checked the PID for us.  */
-	    return ESRCH;
-	}
-      else
-	return INTERNAL_SYSCALL_ERRNO (r, err);
+      *clock_id = pidclock;
+      return 0;
     }
-#endif
-
-  /* We don't allow any process ID but our own.  */
-  if (pid != 0 && pid != getpid ())
-    return EPERM;
 
-#ifdef CLOCK_PROCESS_CPUTIME_ID
-  if (HAS_CPUCLOCK)
+  if (INTERNAL_SYSCALL_ERRNO (r, err) == EINVAL)
     {
-      /* Store the number.  */
-      *clock_id = CLOCK_PROCESS_CPUTIME_ID;
-
-      return 0;
+      /* The clock_getres system call checked the PID for us.  */
+      return ESRCH;
     }
-#endif
-
-  /* We don't have a timer for that.  */
-  return ENOENT;
+  else
+    return INTERNAL_SYSCALL_ERRNO (r, err);
 }
diff --git a/sysdeps/unix/sysv/linux/clock_getres.c b/sysdeps/unix/sysv/linux/clock_getres.c
index 2bada33b40..1e87dd9a8d 100644
--- a/sysdeps/unix/sysv/linux/clock_getres.c
+++ b/sysdeps/unix/sysv/linux/clock_getres.c
@@ -46,89 +46,11 @@
   case CLOCK_MONOTONIC_COARSE:						      \
     SYSCALL_GETRES
 
-#ifdef __NR_clock_getres
 /* We handled the REALTIME clock here.  */
-# define HANDLED_REALTIME	1
-# define HANDLED_CPUTIME	1
+#define HANDLED_REALTIME	1
+#define HANDLED_CPUTIME		1
 
-# if __ASSUME_POSIX_CPU_TIMERS > 0
-
-#  define SYSDEP_GETRES_CPU SYSCALL_GETRES
-#  define SYSDEP_GETRES_CPUTIME	/* Default catches them too.  */
-
-# else
-
-extern int __libc_missing_posix_cpu_timers attribute_hidden;
-
-static int
-maybe_syscall_getres_cpu (clockid_t clock_id, struct timespec *res)
-{
-  int e = EINVAL;
-
-  if (!__libc_missing_posix_cpu_timers)
-    {
-      INTERNAL_SYSCALL_DECL (err);
-      int r = INTERNAL_VSYSCALL (clock_getres, err, 2, clock_id, res);
-      if (!INTERNAL_SYSCALL_ERROR_P (r, err))
-	return 0;
-
-      e = INTERNAL_SYSCALL_ERRNO (r, err);
-      if (e == EINVAL)
-	{
-	  /* Check whether the kernel supports CPU clocks at all.
-	     If not, record it for the future.  */
-	  r = INTERNAL_VSYSCALL (clock_getres, err, 2,
-				 MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
-				 NULL);
-	  if (INTERNAL_SYSCALL_ERROR_P (r, err))
-	    __libc_missing_posix_cpu_timers = 1;
-	}
-    }
-
-  return e;
-}
-
-#  define SYSDEP_GETRES_CPU						      \
-  retval = maybe_syscall_getres_cpu (clock_id, res);			      \
-  if (retval == 0)							      \
-    break;								      \
-  if (retval != EINVAL || !__libc_missing_posix_cpu_timers)		      \
-    {									      \
-      __set_errno (retval);						      \
-      retval = -1;							      \
-      break;								      \
-    }									      \
-  retval = -1 /* Otherwise continue on to the HP_TIMING version.  */;
-
-static inline int
-maybe_syscall_getres_cputime (clockid_t clock_id, struct timespec *res)
-{
-  return maybe_syscall_getres_cpu
-    (clock_id == CLOCK_THREAD_CPUTIME_ID
-     ? MAKE_THREAD_CPUCLOCK (0, CPUCLOCK_SCHED)
-     : MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
-     res);
-}
-
-#  define SYSDEP_GETRES_CPUTIME						      \
-    case CLOCK_PROCESS_CPUTIME_ID:					      \
-    case CLOCK_THREAD_CPUTIME_ID:					      \
-      retval = maybe_syscall_getres_cputime (clock_id, res);		      \
-      if (retval == 0)							      \
-	break;								      \
-      if (retval != EINVAL || !__libc_missing_posix_cpu_timers)		      \
-	{								      \
-	  __set_errno (retval);						      \
-	  retval = -1;							      \
-	  break;							      \
-	}								      \
-      retval = hp_timing_getres (res);					      \
-      break;
-#  if !HP_TIMING_AVAIL
-#   define hp_timing_getres(res) (__set_errno (EINVAL), -1)
-#  endif
-
-# endif
-#endif
+#define SYSDEP_GETRES_CPU SYSCALL_GETRES
+#define SYSDEP_GETRES_CPUTIME	/* Default catches them too.  */
 
 #include <sysdeps/posix/clock_getres.c>
diff --git a/sysdeps/unix/sysv/linux/clock_gettime.c b/sysdeps/unix/sysv/linux/clock_gettime.c
index e333d8d9e8..05dfb9d099 100644
--- a/sysdeps/unix/sysv/linux/clock_gettime.c
+++ b/sysdeps/unix/sysv/linux/clock_gettime.c
@@ -49,99 +49,13 @@
     retval = SYSCALL_GETTIME (clock_id, tp);				      \
     break
 
-#ifdef __NR_clock_gettime
 /* We handled the REALTIME clock here.  */
-# define HANDLED_REALTIME	1
-# define HANDLED_CPUTIME	1
+#define HANDLED_REALTIME	1
+#define HANDLED_CPUTIME	1
 
-# if __ASSUME_POSIX_CPU_TIMERS > 0
-
-#  define SYSDEP_GETTIME_CPU(clock_id, tp) \
+#define SYSDEP_GETTIME_CPU(clock_id, tp) \
   retval = SYSCALL_GETTIME (clock_id, tp); \
   break
-#  define SYSDEP_GETTIME_CPUTIME	/* Default catches them too.  */
-
-# else
-
-int __libc_missing_posix_cpu_timers attribute_hidden;
-
-static int
-maybe_syscall_gettime_cpu (clockid_t clock_id, struct timespec *tp)
-{
-  int e = EINVAL;
-
-  if (!__libc_missing_posix_cpu_timers)
-    {
-      INTERNAL_SYSCALL_DECL (err);
-      int r = INTERNAL_GETTIME (clock_id, tp);
-      if (!INTERNAL_SYSCALL_ERROR_P (r, err))
-	return 0;
-
-      e = INTERNAL_SYSCALL_ERRNO (r, err);
-      if (e == EINVAL)
-	{
-# ifdef HAVE_CLOCK_GETRES_VSYSCALL
-	  /* Check whether the kernel supports CPU clocks at all.
-	     If not, record it for the future.  */
-	  r = INTERNAL_VSYSCALL (clock_getres, err, 2,
-				 MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
-				 NULL);
-# else
-	  /* Check whether the kernel supports CPU clocks at all.
-	     If not, record it for the future.  */
-	  r = INTERNAL_SYSCALL (clock_getres, err, 2,
-				MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
-				NULL);
-# endif
-	  if (INTERNAL_SYSCALL_ERROR_P (r, err))
-	    __libc_missing_posix_cpu_timers = 1;
-	}
-    }
-
-  return e;
-}
-
-#  define SYSDEP_GETTIME_CPU(clock_id, tp) \
-  retval = maybe_syscall_gettime_cpu (clock_id, tp);			      \
-  if (retval == 0)							      \
-    break;								      \
-  if (retval != EINVAL || !__libc_missing_posix_cpu_timers)		      \
-    {									      \
-      __set_errno (retval);						      \
-      retval = -1;							      \
-      break;								      \
-    }									      \
-  retval = -1 /* Otherwise continue on to the HP_TIMING version.  */;
-
-static inline int
-maybe_syscall_gettime_cputime (clockid_t clock_id, struct timespec *tp)
-{
-  return maybe_syscall_gettime_cpu
-    (clock_id == CLOCK_THREAD_CPUTIME_ID
-     ? MAKE_THREAD_CPUCLOCK (0, CPUCLOCK_SCHED)
-     : MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
-     tp);
-}
-
-#  define SYSDEP_GETTIME_CPUTIME					      \
-    case CLOCK_PROCESS_CPUTIME_ID:					      \
-    case CLOCK_THREAD_CPUTIME_ID:					      \
-      retval = maybe_syscall_gettime_cputime (clock_id, tp);		      \
-      if (retval == 0)							      \
-	break;								      \
-      if (retval != EINVAL || !__libc_missing_posix_cpu_timers)		      \
-	{								      \
-	  __set_errno (retval);						      \
-	  retval = -1;							      \
-	  break;							      \
-	}								      \
-      retval = hp_timing_gettime (clock_id, tp);			      \
-      break
-#  if !HP_TIMING_AVAIL
-#   define hp_timing_gettime(clock_id, tp) (__set_errno (EINVAL), -1)
-#  endif
-
-# endif
-#endif
+#define SYSDEP_GETTIME_CPUTIME	/* Default catches them too.  */
 
 #include <sysdeps/unix/clock_gettime.c>
diff --git a/sysdeps/unix/sysv/linux/clock_settime.c b/sysdeps/unix/sysv/linux/clock_settime.c
index f75ceca249..fde662177b 100644
--- a/sysdeps/unix/sysv/linux/clock_settime.c
+++ b/sysdeps/unix/sysv/linux/clock_settime.c
@@ -31,38 +31,6 @@
 # include <bits/libc-vdso.h>
 #endif
 
-#if __ASSUME_POSIX_CPU_TIMERS <= 0 && defined __NR_clock_settime
-extern int __libc_missing_posix_cpu_timers attribute_hidden;
-
-static int
-maybe_syscall_settime_cpu (clockid_t clock_id, const struct timespec *tp)
-{
-  int e = EINVAL;
-
-  if (!__libc_missing_posix_cpu_timers)
-    {
-      INTERNAL_SYSCALL_DECL (err);
-      int r = INTERNAL_SYSCALL (clock_settime, err, 2, clock_id, tp);
-      if (!INTERNAL_SYSCALL_ERROR_P (r, err))
-	return 0;
-
-      e = INTERNAL_SYSCALL_ERRNO (r, err);
-      if (e == EINVAL)
-	{
-	  /* Check whether the kernel supports CPU clocks at all.
-	     If not, record it for the future.  */
-	  r = INTERNAL_VSYSCALL (clock_getres, err, 2,
-				 MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
-				 NULL);
-	  if (INTERNAL_SYSCALL_ERROR_P (r, err))
-	    __libc_missing_posix_cpu_timers = 1;
-	}
-    }
-
-  return e;
-}
-#endif
-
 
 /* The REALTIME clock is definitely supported in the kernel.  */
 #define SYSDEP_SETTIME \
@@ -70,27 +38,11 @@ maybe_syscall_settime_cpu (clockid_t clock_id, const struct timespec *tp)
     retval = INLINE_SYSCALL (clock_settime, 2, clock_id, tp);		      \
     break
 
-#ifdef __NR_clock_settime
 /* We handled the REALTIME clock here.  */
-# define HANDLED_REALTIME	1
-#endif
+#define HANDLED_REALTIME	1
 
-#if __ASSUME_POSIX_CPU_TIMERS > 0
-# define HANDLED_CPUTIME 1
-# define SYSDEP_SETTIME_CPU \
+#define HANDLED_CPUTIME 1
+#define SYSDEP_SETTIME_CPU \
   retval = INLINE_SYSCALL (clock_settime, 2, clock_id, tp)
-#elif defined __NR_clock_settime
-# define SYSDEP_SETTIME_CPU \
-  retval = maybe_syscall_settime_cpu (clock_id, tp);			      \
-  if (retval == 0)							      \
-    break;								      \
-  if (retval != EINVAL || !__libc_missing_posix_cpu_timers)		      \
-    {									      \
-      __set_errno (retval);						      \
-      retval = -1;							      \
-      break;								      \
-    }									      \
-  do { } while (0)
-#endif
 
 #include <sysdeps/unix/clock_settime.c>
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index 33fca5c4f6..61bf32d1b2 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -57,9 +57,6 @@
    MIPS n32).  */
 #define __ASSUME_GETDENTS64_SYSCALL	1
 
-/* Beginning with 2.6.12 the clock and timer supports CPU clocks.  */
-#define __ASSUME_POSIX_CPU_TIMERS	1
-
 /* The statfs64 syscalls are available in 2.5.74 (but not for alpha).  */
 #define __ASSUME_STATFS64	1