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On Fri, Jun 27, 2014 at 09:26:05PM -0700, Roland McGrath wrote: > This name is pretty self-explanatory, but as a general rule a > sysdeps/generic file like should have copious comments that make clear what > the protocol for other sysdeps variants is and what each symbol means. OK, how about this: Siddhesh * sysdeps/generic/memcopy.h: Add comment for MEMCPY_OK_FOR_FWD_MEMMOVE. diff --git a/sysdeps/generic/memcopy.h b/sysdeps/generic/memcopy.h index b39a960..b7bd5e9 100644 --- a/sysdeps/generic/memcopy.h +++ b/sysdeps/generic/memcopy.h @@ -148,6 +148,9 @@ extern void _wordcopy_bwd_dest_aligned (long int, long int, size_t) __THROW; /* Threshold value for when to enter the unrolled loops. */ #define OP_T_THRES 16 +/* Set to 1 if memcpy is safe to use for forward-copying memmove with + overlapping addresses. This is 0 by default because memcpy implementations + are generally not safe for overlapping addresses. */ #define MEMCPY_OK_FOR_FWD_MEMMOVE 0 #endif /* memcopy.h */
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