Re: [PATCH] ARC: uaccess: get_user to zero out dest in cause of fault
From: Al Viro <viro@ZenIV.linux.org.uk>
Date: 2016-08-23 00:17:24
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On Mon, Aug 22, 2016 at 04:48:00PM -0700, Linus Torvalds wrote:
On Mon, Aug 22, 2016 at 4:12 PM, H. Peter Anvin [off-list ref] wrote:quoted
How about the gcc native __builtin_setjmp stuff which is supposedly better?How new is it? The whole point was that we'd not have to worry and wait for gcc features..
Sat Jan 27 07:59:25 1996 Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
* tree.h (enum built_in_function): Add BUILT_IN_{SET,LONG}JMP.
* expr.c: Include hard-reg-set.h.
(arg_pointer_save_area): New declaration.
(expand_builtin, case BUILT_IN_{SET,LONG}JMP): New cases.
* Makefile.in (expr.o): Includes hard-reg-set.h.
* c-decl.c (init_decl_processing): Add definitions for
__builtin_setjmp and __builtin_longjmp.
* cccp.c (initialize_builtins): Add def of __HAVE_BUILTIN_SETJMP__.
* expr.c (expand_expr, case COMPONENT_REF): Pass EXPAND_INITIALIZER
to recursive call.
IOW - old; the last branch lacking it is 2.7.2.* Both 2.8 and egcs (and thus
2.95 and everything subsequent) have it.