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s390/mm: Fix type mismatch in get_align_mask().

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Commit 86f48f922b ("s390/mmap: disable mmap alignment when
randomize_va_space = 0") introduced get_align_mask() with return type of
'int', while the target field 'info.align_mask' in struct
vm_unmapped_area_info is 'unsigned long'.

With currently used masks, this should not cause truncation issues, but
fix it and return 'unsigned long' to avoid future problems.

Fixes: 86f48f922b ("s390/mmap: disable mmap alignment when randomize_va_space = 0")
Cc: stable@vger.kernel.org # v6.9+
Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Gerald Schaefer 2026-06-30 19:32:14 +02:00 committed by Vasily Gorbik
parent b7577fe4c4
commit ec84aad4c3
1 changed files with 1 additions and 1 deletions
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2
arch/s390/mm/mmap.c
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@ -64,7 +64,7 @@ static inline unsigned long mmap_base(unsigned long rnd,
return PAGE_ALIGN(STACK_TOP - gap - rnd);
}
static int get_align_mask(struct file *filp, unsigned long flags)
static unsigned long get_align_mask(struct file *filp, unsigned long flags)
{
if (filp && is_file_hugepages(filp))
return huge_page_mask_align(filp);