Commit d3722ff5 authored by Petr Tesarik's avatar Petr Tesarik Committed by Vlastimil Babka
Browse files

slab: constify slab debug strings 



Since the string passed to slab_debug is never modified, use pointers to
const char in all places where it is processed.

No functional changes intended.

Signed-off-by: default avatarPetr Tesarik <ptesarik@suse.com>
Reviewed-by: default avatarChristoph Lameter <cl@gentwo.org>
Link: https://patch.msgid.link/819095b921f6ae03bb54fd69ee4020e2a3aef675.1761324765.git.ptesarik@suse.com


Reviewed-by: default avatarHarry Yoo <harry.yoo@oracle.com>
Signed-off-by: default avatarVlastimil Babka <vbabka@suse.cz>
parent dcb6fa37

mm/slub.c

+10 −9
Original line number Diff line number Diff line
@@ -978,7 +978,7 @@ static slab_flags_t slub_debug = DEBUG_DEFAULT_FLAGS; 
static slab_flags_t slub_debug;

#endif



static char *slub_debug_string;

static const char *slub_debug_string __ro_after_init;

static int disable_higher_order_debug;



/*
@@ -1785,8 +1785,8 @@ static inline int free_consistency_checks(struct kmem_cache *s, 
 *

 * returns the start of next block if there's any, or NULL

 */

static char *

parse_slub_debug_flags(char *str, slab_flags_t *flags, char **slabs, bool init)

static const char *

parse_slub_debug_flags(const char *str, slab_flags_t *flags, const char **slabs, bool init)

{

	bool higher_order_disable = false;
@@ -1863,14 +1863,15 @@ parse_slub_debug_flags(char *str, slab_flags_t *flags, char **slabs, bool init) 
		return NULL;

}



static int __init setup_slub_debug(char *str)

static int __init setup_slub_debug(char *val)

{

	slab_flags_t flags;

	slab_flags_t global_flags;

	char *saved_str;

	char *slab_list;

	const char *saved_str;

	const char *slab_list;

	bool global_slub_debug_changed = false;

	bool slab_list_specified = false;

	const char *str = val;



	global_flags = DEBUG_DEFAULT_FLAGS;

	if (*str++ != '=' || !*str)
@@ -1935,9 +1936,9 @@ __setup_param("slub_debug", slub_debug, setup_slub_debug, 0); 
 */

slab_flags_t kmem_cache_flags(slab_flags_t flags, const char *name)

{

	char *iter;

	const char *iter;

	size_t len;

	char *next_block;

	const char *next_block;

	slab_flags_t block_flags;

	slab_flags_t slub_debug_local = slub_debug;
@@ -1961,7 +1962,7 @@ slab_flags_t kmem_cache_flags(slab_flags_t flags, const char *name) 
			continue;

		/* Found a block that has a slab list, search it */

		while (*iter) {

			char *end, *glob;

			const char *end, *glob;

			size_t cmplen;



			end = strchrnul(iter, ',');