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| author | Al Viro <viro@ftp.linux.org.uk> | 2011-08-18 21:00:49 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2011-11-02 14:14:42 +0100 |
| commit | a955bd611d6426bf7b61cab01f8ddee9cc169736 (patch) | |
| tree | f2f42f996bbb757e6f8ebd805fe1e975893dcc32 /arch/um/Makefile | |
| parent | um: make copy_sc() static (diff) | |
| download | linux-a955bd611d6426bf7b61cab01f8ddee9cc169736.tar.xz linux-a955bd611d6426bf7b61cab01f8ddee9cc169736.zip | |
um: series of __get_user() is costly in sigframe handling
It's not x86, where __get_user() is a single dereference; here it's
a single ptrace(2) call in host, which obviously costs a lot more.
IOW, it's cheaper to do copy_{to,from}_user() once than bother with
fields one by one...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/Makefile')
0 files changed, 0 insertions, 0 deletions