Messages in this thread | | | Date | Fri, 23 Jan 2009 15:48:07 -0800 | From | Hiroshi Shimamoto <> | Subject | [RFC v2 -tip 0/3] x86: reduce fixup of uaccess |
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This patch series redues fixup code for exceptions of uaccess in signal.
There is a lot of fixup code which is generated by using __{get|put}_user. I think that code can be reduced. The concept is that to add uaccess_err in thread_info and set it to -EFAULT on exception, finally check this value on the last of function.
The code size reductions are below; $ size *signal*.o.* text data bss dec hex filename 4596 0 0 4596 11f4 ia32_signal.o.new 6006 0 0 6006 1776 ia32_signal.o.old 3583 0 0 3583 dff signal.o.new 4540 0 0 4540 11bc signal.o.old 3863 0 0 3863 f17 signal32.o.new 4876 0 0 4876 130c signal32.o.old [ signal32.o means signal.o on 32-bit. ]
ChangeLog v1 -> v2 - Change framework syntax. Previous version doesn't look easy to read. Remove parens from try and add redundant braces as Peter suggested. get_user_try { get_user_ex(...); : } get_user_catch(err); - Remove double underscores.
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