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Commit8496c6c

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Use 4-byte slock_t on both PPC and PPC64.
Previously we defined slock_t as 8 bytes on PPC64, but the TAS assemblycode uses word-wide operations regardless, so that the second word wasjust wasted space. There doesn't appear to be any performance benefitin adding the second word, so get rid of it to simplify the code.
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‎src/include/storage/s_lock.h

Lines changed: 1 addition & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -354,13 +354,10 @@ tas(volatile slock_t *lock)
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#if defined(__ppc__)|| defined(__powerpc__)|| defined(__ppc64__)|| defined(__powerpc64__)
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#defineHAS_TEST_AND_SET
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#if defined(__ppc64__)|| defined(__powerpc64__)
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typedefunsigned longslock_t;
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#else
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typedefunsignedintslock_t;
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#endif
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#defineTAS(lock) tas(lock)
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/*
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* NOTE: per the Enhanced PowerPC Architecture manual, v1.0 dated 7-May-2002,
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* an isync is a sufficient synchronization barrier after a lwarx/stwcx loop.

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