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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2022-06-12 17:33:20 +0200 |
|---|---|---|
| committer | Luis Chamberlain <mcgrof@kernel.org> | 2022-07-01 14:45:24 -0700 |
| commit | f963ef123900ac534aeb6141642e5351989ac14c (patch) | |
| tree | 7c4a61237a80d5dd1c727b96eed3ddb8e2f538bd /kernel/module | |
| parent | cfa94c538be621a0ba645adfa9ead005b5fa02f6 (diff) | |
| download | linux-f963ef123900ac534aeb6141642e5351989ac14c.tar.gz | |
module: Fix "warning: variable 'exit' set but not used"
When CONFIG_MODULE_UNLOAD is not selected, 'exit' is
set but never used.
It is not possible to replace the #ifdef CONFIG_MODULE_UNLOAD by
IS_ENABLED(CONFIG_MODULE_UNLOAD) because mod->exit doesn't exist
when CONFIG_MODULE_UNLOAD is not selected.
And because of the rcu_read_lock_sched() section it is not easy
to regroup everything in a single #ifdef. Let's regroup partially
and add missing #ifdef to completely opt out the use of
'exit' when CONFIG_MODULE_UNLOAD is not selected.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'kernel/module')
| -rw-r--r-- | kernel/module/main.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/module/main.c b/kernel/module/main.c index fed58d30725de..0548151dd9339 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -2939,24 +2939,25 @@ static void cfi_init(struct module *mod) { #ifdef CONFIG_CFI_CLANG initcall_t *init; +#ifdef CONFIG_MODULE_UNLOAD exitcall_t *exit; +#endif rcu_read_lock_sched(); mod->cfi_check = (cfi_check_fn) find_kallsyms_symbol_value(mod, "__cfi_check"); init = (initcall_t *) find_kallsyms_symbol_value(mod, "__cfi_jt_init_module"); - exit = (exitcall_t *) - find_kallsyms_symbol_value(mod, "__cfi_jt_cleanup_module"); - rcu_read_unlock_sched(); - /* Fix init/exit functions to point to the CFI jump table */ if (init) mod->init = *init; #ifdef CONFIG_MODULE_UNLOAD + exit = (exitcall_t *) + find_kallsyms_symbol_value(mod, "__cfi_jt_cleanup_module"); if (exit) mod->exit = *exit; #endif + rcu_read_unlock_sched(); cfi_module_add(mod, mod_tree.addr_min); #endif |