Messages in this thread | | | From | David Howells <> | Subject | Re: [PATCH] get rid of "+m" constraint in i386 rwsems | Date | Thu, 06 May 2004 13:58:16 +0100 |
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> Can you explain the need for the change?
gcc-3.4 generates warnings about it:
include/asm/rwsem.h: In function `avc_audit': include/asm/rwsem.h:126: warning: read-write constraint does not allow a register include/asm/rwsem.h:126: warning: read-write constraint does not allow a register
The gcc people (or at least one of them) seem to think that these warnings are correct on a "+m" constraint. See:
http://marc.theaimsgroup.com/?l=linux-kernel&m=107475162200773&w=2
I understood "+m" to be a shorthand way of specifying "=m" and "m" on the same bit of memory, but apparently it that's not what it means.
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