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List:       glibc-cvs
Subject:    GNU C Library master sources branch master updated. glibc-2.20-570-gdf34134
From:       jsm28 () sourceware ! org
Date:       2015-01-28 18:44:36
Message-ID: 20150128184436.17904.qmail () sourceware ! org
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The branch, master has been updated
       via  df34134284b46cdd8ffd39551b858652d465ca08 (commit)
      from  d4d0ecb24474928b9dfcce6c3f09694fab2400b6 (commit)

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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=df34134284b46cdd8ffd39551b858652d465ca08

commit df34134284b46cdd8ffd39551b858652d465ca08
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Jan 28 18:40:35 2015 +0000

    Disable 64-bit atomics for MIPS n32.
    
    This patch disables use of 64-bit atomics for MIPS n32 to fix the
    problems with unaligned semaphores.
    
    Before 64-bit atomics are used for anything for which such alignment
    issues do not arise, and before the addition of any new ILP32 ports
    with 64-bit semaphores for which the ABI can be set to have the
    greater alignment (AARCH64?), a better approach will need to be
    established that allows architectures to declare their 64-bit atomics
    availability accurately, without doing so causing inappropriate use of
    such atomics on unaligned semaphores.
    
    Tested for MIPS n32 that this fixes the nptl/tst-sem3 failure.
    
    	* sysdeps/mips/bits/atomic.h [_MIPS_SIM == _ABIN32]
    	(__HAVE_64B_ATOMICS): Define to 0.

diff --git a/ChangeLog b/ChangeLog
index 52f8c11..1a7d519 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-01-28  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/mips/bits/atomic.h [_MIPS_SIM == _ABIN32]
+	(__HAVE_64B_ATOMICS): Define to 0.
+
 2015-01-28  Adhemerval Zanellla  <azanella@linux.vnet.ibm.com>
 
 	[BZ #17885]
diff --git a/sysdeps/mips/bits/atomic.h b/sysdeps/mips/bits/atomic.h
index ddcb039..a391881 100644
--- a/sysdeps/mips/bits/atomic.h
+++ b/sysdeps/mips/bits/atomic.h
@@ -44,7 +44,7 @@ typedef uintmax_t uatomic_max_t;
 #define MIPS_PUSH_MIPS2
 #endif
 
-#if _MIPS_SIM == _ABIO32
+#if _MIPS_SIM == _ABIO32 || _MIPS_SIM == _ABIN32
 #define __HAVE_64B_ATOMICS 0
 #else
 #define __HAVE_64B_ATOMICS 1

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                  |    5 +++++
 sysdeps/mips/bits/atomic.h |    2 +-
 2 files changed, 6 insertions(+), 1 deletions(-)


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