Commit 9cb610d8 authored by Rusty Russell's avatar Rusty Russell

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: default avatarRusty Russell <rusty@rustcorp.com.au>
parent c6e665c8
...@@ -1961,6 +1961,9 @@ static noinline struct module *load_module(void __user *umod, ...@@ -1961,6 +1961,9 @@ static noinline struct module *load_module(void __user *umod,
if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0) if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0)
sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC; sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
#endif #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, modindex = find_sec(hdr, sechdrs, secstrings,
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment