linux-atomic.c (EBUSY): Define if not _LP64.
* pa/linux-atomic.c (EBUSY): Define if not _LP64. (__kernel_cmpxchg): Return -EBUSY if the kernel LWS call succeeded and lws_ret is not equal to oldval. From-SVN: r142141
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@ -1,3 +1,9 @@
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2008-11-23 Helge Deller <deller@gmx.de>
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* pa/linux-atomic.c (EBUSY): Define if not _LP64.
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(__kernel_cmpxchg): Return -EBUSY if the kernel LWS call
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succeeded and lws_ret is not equal to oldval.
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2008-11-23 Kaz Kojima <kkojima@gcc.gnu.org>
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* config/sh/sh.md (consttable_4): Call mark_symbol_refs_as_used.
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@ -33,8 +33,9 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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#ifndef _LP64
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#include <errno.h>
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#else
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#define EFAULT 14
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#define EBUSY 16
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#define ENOSYS 251
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#define EFAULT 14
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#endif
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/* All PA-RISC implementations supported by linux have strongly
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@ -74,6 +75,13 @@ __kernel_cmpxchg (int oldval, int newval, int *mem)
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);
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if (__builtin_expect (lws_errno == -EFAULT || lws_errno == -ENOSYS, 0))
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ABORT_INSTRUCTION;
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/* If the kernel LWS call succeeded (lws_errno == 0), lws_ret contains
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the old value from memory. If this value is equal to OLDVAL, the
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new value was written to memory. If not, return -EBUSY. */
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if (!lws_errno && lws_ret != oldval)
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lws_errno = -EBUSY;
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return lws_errno;
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}
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