module: remove the SHF_ALLOC flag on the __versions section.
Impact: reduce kernel memory usage
This patch just takes off the SHF_ALLOC flag on __versions so we don't
keep them around after module load.
This saves about 7% of module memory if CONFIG_MODVERSIONS=y.
Cc: Shawn Bohrer <shawn.bohrer@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/kernel/module.c b/kernel/module.c
index 599fc85..784bf6d 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1961,6 +1961,9 @@
if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0)
sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
#endif
+ /* Don't keep __versions around; it's just for loading. */
+ if (strcmp(secstrings + sechdrs[i].sh_name, "__versions") == 0)
+ sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
}
modindex = find_sec(hdr, sechdrs, secstrings,