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module: remove the SHF_ALLOC flag on the __versions section.

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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>
This commit is contained in:
Rusty Russell 2009-03-31 13:05:33 -06:00
parent c6e665c8f0
commit 9cb610d8e3
1 changed files with 3 additions and 0 deletions
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3
kernel/module.c
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@ -1961,6 +1961,9 @@ static noinline struct module *load_module(void __user *umod,
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,