modutils: add FEATURE_INSMOD_TRY_MMAP option

function                                             old     new   delta
try_to_mmap_module                                     -     121    +121
bb_init_module_24                                   4514    4578     +64
bb_init_module                                       119     173     +54
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 239/0)             Total: 239 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/modutils/modutils.h b/modutils/modutils.h
index 1cf4bba95..131a5087b 100644
--- a/modutils/modutils.h
+++ b/modutils/modutils.h
@@ -51,6 +51,12 @@ enum {
 #endif
 };
 
+#if ENABLE_FEATURE_INSMOD_TRY_MMAP
+void* FAST_FUNC try_to_mmap_module(const char *filename, size_t *image_size_p);
+#else
+# define try_to_mmap_module(filename, image_size) NULL
+#endif
+
 /* Return:
  * 0 on success,
  * -errno on open/read error,