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| -rw-r--r-- | man7/nptl.7 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/man7/nptl.7 b/man7/nptl.7 index c648591089..80c5cfe497 100644 --- a/man7/nptl.7 +++ b/man7/nptl.7 @@ -114,6 +114,17 @@ and .SH CONFORMING TO For details of the conformance of NPTL to the POSIX standard, see .BR pthreads (7). +.SH NOTES +POSIX says +.\" See POSIX.1-2008 specification of pthread_mutexattr_init() +that any thread in any process with access to the memory +containing a process-shared +.RB ( PTHREAD_PROCESS_SHARED ) +mutex can operate on that mutex. +However, on 64-bit x86 systems, the mutex definition for x86-64 +is incompatible with the mutex definition for i386, +.\" See sysdeps/x86/bits/pthreadtypes.h +meaning that 32-bit and 64-bit binaries can't share mutexes on x86-64 systems. .SH SEE ALSO .BR credentials (7), .BR pthreads (7), |