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module: Fix selfAssignment cppcheck warning 

cppcheck reports the following warnings:

kernel/module/main.c:1455:26: warning: Redundant assignment of 'mod->core_layout.size' to itself. [selfAssignment]
   mod->core_layout.size = strict_align(mod->core_layout.size);
                         ^
kernel/module/main.c:1489:26: warning: Redundant assignment of 'mod->init_layout.size' to itself. [selfAssignment]
   mod->init_layout.size = strict_align(mod->init_layout.size);
                         ^
kernel/module/main.c:1493:26: warning: Redundant assignment of 'mod->init_layout.size' to itself. [selfAssignment]
   mod->init_layout.size = strict_align(mod->init_layout.size);
                         ^
kernel/module/main.c:1504:26: warning: Redundant assignment of 'mod->init_layout.size' to itself. [selfAssignment]
   mod->init_layout.size = strict_align(mod->init_layout.size);
                         ^
kernel/module/main.c:1459:26: warning: Redundant assignment of 'mod->data_layout.size' to itself. [selfAssignment]
   mod->data_layout.size = strict_align(mod->data_layout.size);
                         ^
kernel/module/main.c:1463:26: warning: Redundant assignment of 'mod->data_layout.size' to itself. [selfAssignment]
   mod->data_layout.size = strict_align(mod->data_layout.size);
                         ^
kernel/module/main.c:1467:26: warning: Redundant assignment of 'mod->data_layout.size' to itself. [selfAssignment]
   mod->data_layout.size = strict_align(mod->data_layout.size);
                         ^

This is due to strict_align() being a no-op when
CONFIG_STRICT_MODULE_RWX is not selected.

Transform strict_align() macro into an inline function. It will
allow type checking and avoid the selfAssignment warning.

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>
This commit is contained in:
Christophe Leroy 2022-06-12 17:21:56 +02:00 committed by Luis Chamberlain
parent 35adf9a4e5
commit cfa94c538b
1 changed files with 8 additions and 5 deletions
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13
kernel/module/internal.h
View File

@ -11,6 +11,7 @@
#include <linux/mutex.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
#include <linux/mm.h>
#ifndef ARCH_SHF_SMALL
#define ARCH_SHF_SMALL 0
@ -30,11 +31,13 @@
* to ensure complete separation of code and data, but
* only when CONFIG_STRICT_MODULE_RWX=y
*/
#ifdef CONFIG_STRICT_MODULE_RWX
# define strict_align(X) PAGE_ALIGN(X)
#else
# define strict_align(X) (X)
#endif
static inline unsigned int strict_align(unsigned int size)
{
if (IS_ENABLED(CONFIG_STRICT_MODULE_RWX))
return PAGE_ALIGN(size);
else
return size;
}
extern struct mutex module_mutex;
extern struct list_head modules;