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mm, madvise: move madvise_set_anon_name() down the file

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Preparatory change so that we can use madvise_lock()/unlock() in the
function without forward declarations or more thorough shuffling.

No functional change.  Move as a separate commit helps git heuristics to
detect it properly.

Link: https://lkml.kernel.org/r/20250624-anon_name_cleanup-v2-3-600075462a11@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Tested-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Colin Cross <ccross@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Vlastimil Babka
2025-06-24 15:03:47 +02:00
committed by Andrew Morton
parent 6b233784b1
commit 986738ce44
1 changed files with 32 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

64
mm/madvise.c
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@@ -133,38 +133,6 @@ static int replace_anon_vma_name(struct vm_area_struct *vma,
return 0;
}
static int madvise_set_anon_name(struct mm_struct *mm, unsigned long start,
unsigned long len_in, struct anon_vma_name *anon_name)
{
unsigned long end;
unsigned long len;
struct madvise_behavior madv_behavior = {
.mm = mm,
.behavior = __MADV_SET_ANON_VMA_NAME,
.lock_mode = MADVISE_MMAP_WRITE_LOCK,
.anon_name = anon_name,
};
if (start & ~PAGE_MASK)
return -EINVAL;
len = (len_in + ~PAGE_MASK) & PAGE_MASK;
/* Check to see whether len was rounded up from small -ve to zero */
if (len_in && !len)
return -EINVAL;
end = start + len;
if (end < start)
return -EINVAL;
if (end == start)
return 0;
madv_behavior.range.start = start;
madv_behavior.range.end = end;
return madvise_walk_vmas(&madv_behavior);
}
#else /* CONFIG_ANON_VMA_NAME */
static int replace_anon_vma_name(struct vm_area_struct *vma,
struct anon_vma_name *anon_name)
@@ -2109,6 +2077,38 @@ static inline bool is_valid_name_char(char ch)
!strchr(ANON_VMA_NAME_INVALID_CHARS, ch);
}
static int madvise_set_anon_name(struct mm_struct *mm, unsigned long start,
unsigned long len_in, struct anon_vma_name *anon_name)
{
unsigned long end;
unsigned long len;
struct madvise_behavior madv_behavior = {
.mm = mm,
.behavior = __MADV_SET_ANON_VMA_NAME,
.lock_mode = MADVISE_MMAP_WRITE_LOCK,
.anon_name = anon_name,
};
if (start & ~PAGE_MASK)
return -EINVAL;
len = (len_in + ~PAGE_MASK) & PAGE_MASK;
/* Check to see whether len was rounded up from small -ve to zero */
if (len_in && !len)
return -EINVAL;
end = start + len;
if (end < start)
return -EINVAL;
if (end == start)
return 0;
madv_behavior.range.start = start;
madv_behavior.range.end = end;
return madvise_walk_vmas(&madv_behavior);
}
int set_anon_vma_name(unsigned long addr, unsigned long size,
const char __user *uname)
{