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| author |   Peter Zijlstra <peterz@infradead.org> | 2015-05-27 11:09:37 +0930 |
|---|---|---|
| committer |   Rusty Russell <rusty@rustcorp.com.au> | 2015-05-28 11:32:07 +0930 |
| commit | 6c9692e2d6a2206d8fd75ea247daa47fb75e4a02 (patch) | |
| tree | 260a11511b3b629ec1cbcdeb3417e74590028e99 /include/linux/module.h | |
| parent | module: Optimize __module_address() using a latched RB-tree (diff) | |
| download | linux-dev-6c9692e2d6a2206d8fd75ea247daa47fb75e4a02.tar.xz linux-dev-6c9692e2d6a2206d8fd75ea247daa47fb75e4a02.zip | |
module: Make the mod_tree stuff conditional on PERF_EVENTS || TRACING
Andrew worried about the overhead on small systems; only use the fancy
code when either perf or tracing is enabled.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Requested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/module.h')
| -rw-r--r-- | include/linux/module.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/module.h b/include/linux/module.h index ddf35a3368fb..4c1b02e1361d 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -282,7 +282,7 @@ struct module { * * Cacheline align here, such that: * module_init, module_core, init_size, core_size, - * init_text_size, core_text_size and ltn_core.node[0] + * init_text_size, core_text_size and mtn_core::{mod,node[0]} * are on the same cacheline. */ void *module_init ____cacheline_aligned; @@ -296,6 +296,7 @@ struct module { /* The size of the executable code in each section. */ unsigned int init_text_size, core_text_size; +#ifdef CONFIG_MODULES_TREE_LOOKUP /* * We want mtn_core::{mod,node[0]} to be in the same cacheline as the * above entries such that a regular lookup will only touch one @@ -303,6 +304,7 @@ struct module { */ struct mod_tree_node mtn_core; struct mod_tree_node mtn_init; +#endif /* Size of RO sections of the module (text+rodata) */ unsigned int init_ro_size, core_ro_size; |