The patch titled
Subject: mseal: remove can_do_mseal()
has been added to the -mm mm-unstable branch. Its filename is
mseal-remove-can_do_mseal.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mseal-remove-can_do_mseal.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Jeff Xu <jeffxu@xxxxxxxxxxxx>
Subject: mseal: remove can_do_mseal()
Date: Fri, 6 Dec 2024 19:48:39 +0000
No code logic change.
can_do_mseal() is called exclusively by mseal.c, and mseal.c is compiled
only when CONFIG_64BIT flag is set in makefile. Therefore, it is
unnecessary to have 32 bit stub function in the header file, remove this
function and merge the logic into do_mseal().
Link: https://lkml.kernel.org/r/20241206013934.2782793-1-jeffxu@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20241206194839.3030596-2-jeffxu@xxxxxxxxxx
Signed-off-by: Jeff Xu <jeffxu@xxxxxxxxxxxx>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
Cc: Jorge Lucangeli Obes <jorgelo@xxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Pedro Falcato <pedro.falcato@xxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/internal.h | 16 ----------------
mm/mseal.c | 6 +++---
2 files changed, 3 insertions(+), 19 deletions(-)
--- a/mm/internal.h~mseal-remove-can_do_mseal
+++ a/mm/internal.h
@@ -1457,22 +1457,6 @@ void __meminit __init_single_page(struct
unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg,
int priority);
-#ifdef CONFIG_64BIT
-static inline int can_do_mseal(unsigned long flags)
-{
- if (flags)
- return -EINVAL;
-
- return 0;
-}
-
-#else
-static inline int can_do_mseal(unsigned long flags)
-{
- return -EPERM;
-}
-#endif
-
#ifdef CONFIG_SHRINKER_DEBUG
static inline __printf(2, 0) int shrinker_debugfs_name_alloc(
struct shrinker *shrinker, const char *fmt, va_list ap)
--- a/mm/mseal.c~mseal-remove-can_do_mseal
+++ a/mm/mseal.c
@@ -217,9 +217,9 @@ int do_mseal(unsigned long start, size_t
unsigned long end;
struct mm_struct *mm = current->mm;
- ret = can_do_mseal(flags);
- if (ret)
- return ret;
+ /* Verify flags not set. */
+ if (flags)
+ return -EINVAL;
start = untagged_addr(start);
if (!PAGE_ALIGNED(start))
_
Patches currently in -mm which might be from jeffxu@xxxxxxxxxxxx are
selftest-mm-remove-seal_elf.patch
mseal-remove-can_do_mseal.patch
