For the architectures with it's own module_alloc(), if module init size is zero, avoiding module_alloc_update_bounds() and memset() no-op calls also eliminates warn_alloc_failed() zero-size warning in __vmalloc_node_range().

Signed-off-by: Dmitry Antipov dmitry.antipov@linaro.org --- kernel/module.c | 31 +++++++++++++++++-------------- 1 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/kernel/module.c b/kernel/module.c index 2c93276..bbe1c5b 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -2644,20 +2644,23 @@ static int move_module(struct module *mod, struct load_info *info) memset(ptr, 0, mod->core_size); mod->module_core = ptr;

- ptr = module_alloc_update_bounds(mod->init_size); - /* - * The pointer to this block is stored in the module structure - * which is inside the block. This block doesn't need to be - * scanned as it contains data and code that will be freed - * after the module is initialized. - */ - kmemleak_ignore(ptr); - if (!ptr && mod->init_size) { - module_free(mod, mod->module_core); - return -ENOMEM; - } - memset(ptr, 0, mod->init_size); - mod->module_init = ptr; + if (mod->init_size) { + ptr = module_alloc_update_bounds(mod->init_size); + /* + * The pointer to this block is stored in the module structure + * which is inside the block. This block doesn't need to be + * scanned as it contains data and code that will be freed + * after the module is initialized. + */ + kmemleak_ignore(ptr); + if (!ptr) { + module_free(mod, mod->module_core); + return -ENOMEM; + } + memset(ptr, 0, mod->init_size); + mod->module_init = ptr; + } else + mod->module_init = NULL;

/* Transfer each section which specifies SHF_ALLOC */ pr_debug("final section addresses:\n");