| commit | ef1b893c29d0dba778f67ad97b554b37f9108dcc | |
| author | Andi Kleen <ak@linux.intel.com> | |
| Sat, 8 Feb 2014 08:01:08 +0000 (8 09:01 +0100) | ||
| committer | H. Peter Anvin <hpa@linux.intel.com> | |
| Fri, 14 Feb 2014 04:24:13 +0000 (13 20:24 -0800) | ||
| tree | c77e509d240979f0718d6778a6abfe42fc0b59c3 | treesnapshot (tar.gz zip) |
| parent | 128ea04a9885af9629059e631ddf0cab4815b589 | commitdiff |
lto, workaround: Add workaround for initcall reordering
Work around a LTO gcc problem: when there is no reference to a variable
in a module it will be moved to the end of the program. This causes
reordering of initcalls which the kernel does not like.
Add a dummy reference function to avoid this. The function is
deleted by the linker.
This replaces a previous much slower workaround.
Thanks to Jan "Honza" Hubička for suggesting this technique.
Suggested-by: Jan Hubička <hubicka@ucw.cz>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1391846481-31491-4-git-send-email-ak@linux.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Work around a LTO gcc problem: when there is no reference to a variable
in a module it will be moved to the end of the program. This causes
reordering of initcalls which the kernel does not like.
Add a dummy reference function to avoid this. The function is
deleted by the linker.
This replaces a previous much slower workaround.
Thanks to Jan "Honza" Hubička for suggesting this technique.
Suggested-by: Jan Hubička <hubicka@ucw.cz>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1391846481-31491-4-git-send-email-ak@linux.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| include/linux/init.h | diffblobblamehistory |