Merge changes between r23097 and r23217 from /fsf/trunk.

git-svn-id: svn://svn.eglibc.org/trunk@23218 7b3dc134-2b1b-0410-93df-9e9f96275f8d

3 files changed, 53 insertions, 7 deletions

diff --git a/libc/manual/arith.texi b/libc/manual/arith.texi
index ce8844ec2..77056c3ea 100644
--- a/libc/manual/arith.texi
+++ b/libc/manual/arith.texi
@@ -1221,8 +1221,8 @@ These functions are used to split the number @var{value}
 into a normalized fraction and an exponent.
 
 If the argument @var{value} is not zero, the return value is @var{value}
-times a power of two, and is always in the range 1/2 (inclusive) to 1
-(exclusive).  The corresponding exponent is stored in
+times a power of two, and its magnitude is always in the range 1/2
+(inclusive) to 1 (exclusive).  The corresponding exponent is stored in
 @code{*@var{exponent}}; the return value multiplied by 2 raised to this
 exponent equals the original number @var{value}.
 
diff --git a/libc/manual/errno.texi b/libc/manual/errno.texi
index 2a3c004b2..6c9fa865d 100644
--- a/libc/manual/errno.texi
+++ b/libc/manual/errno.texi
@@ -739,13 +739,14 @@ The user's disk quota was exceeded.
 @end deftypevr
 
 @comment errno.h
-@comment BSD: Stale NFS file handle
+@comment BSD: Stale file handle
 @deftypevr Macro int ESTALE
 @comment errno 70 @c DO NOT REMOVE
-Stale NFS file handle.  This indicates an internal confusion in the NFS
-system which is due to file system rearrangements on the server host.
-Repairing this condition usually requires unmounting and remounting
-the NFS file system on the local host.
+Stale file handle.  This indicates an internal confusion in the
+file system which is due to file system rearrangements on the server host
+for NFS file systems or corruption in other file systems.
+Repairing this condition usually requires unmounting, possibly repairing
+and remounting the file system.
 @end deftypevr
 
 @comment errno.h
diff --git a/libc/manual/platform.texi b/libc/manual/platform.texi
index e387ff4cc..99f46755a 100644
--- a/libc/manual/platform.texi
+++ b/libc/manual/platform.texi
@@ -34,3 +34,48 @@ This frequency is not related to the processor clock or the bus clock.
 It is also possible that this frequency is not constant.  More information is
 available in @cite{Power ISA 2.06b - Book II - Section 5.2}.
 @end deftypefun
+
+The following functions provide hints about the usage of resources that are
+shared with other processors.  They can be used, for example, if a program
+waiting on a lock intends to divert the shared resources to be used by other
+processors.  More information is available in @cite{Power ISA 2.06b - Book II -
+Section 3.2}.
+
+@deftypefun {void} __ppc_yield (void)
+Provide a hint that performance will probably be improved if shared resources
+dedicated to the executing processor are released for use by other processors.
+@end deftypefun
+
+@deftypefun {void} __ppc_mdoio (void)
+Provide a hint that performance will probably be improved if shared resources
+dedicated to the executing processor are released until all outstanding storage
+accesses to caching-inhibited storage have been completed.
+@end deftypefun
+
+@deftypefun {void} __ppc_mdoom (void)
+Provide a hint that performance will probably be improved if shared resources
+dedicated to the executing processor are released until all outstanding storage
+accesses to cacheable storage for which the data is not in the cache have been
+completed.
+@end deftypefun
+
+@deftypefun {void} __ppc_set_ppr_med (void)
+Set the Program Priority Register to medium value (default).
+
+The @dfn{Program Priority Register} (PPR) is a 64-bit register that controls
+the program's priority.  By adjusting the PPR value the programmer may
+improve system throughput by causing the system resources to be used
+more efficiently, especially in contention situations.
+The three unprivileged states available are covered by the functions
+@code{__ppc_set_ppr_med} (medium -- default), @code{__ppc_set_ppc_low} (low)
+and @code{__ppc_set_ppc_med_low} (medium low).  More information
+available in @cite{Power ISA 2.06b - Book II - Section 3.1}.
+@end deftypefun
+
+@deftypefun {void} __ppc_set_ppr_low (void)
+Set the Program Priority Register to low value.
+@end deftypefun
+
+@deftypefun {void} __ppc_set_ppr_med_low (void)
+Set the Program Priority Register to medium low value.
+@end deftypefun