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s390/mm: Simplify gap clamping in mmap_base() using clamp()

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mmap_base() has logic to ensure that the variable "gap" stays within the
range defined by "gap_min" and "gap_max". Replace this with the clamp()
macro to shorten and simplify code.

Signed-off-by: Qasim Ijaz <qasdev00@gmail.com>
Link: https://lore.kernel.org/r/20250204162508.12335-1-qasdev00@gmail.com
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
[gor@linux.ibm.com: also remove the gap_min and gap_max variables]
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Qasim Ijaz 2025-02-04 16:25:08 +00:00 committed by Vasily Gorbik
parent ad9bb8f049
commit a702b633c0
1 changed files with 1 additions and 8 deletions
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9
arch/s390/mm/mmap.c
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@ -51,7 +51,6 @@ static inline unsigned long mmap_base(unsigned long rnd,
{
unsigned long gap = rlim_stack->rlim_cur;
unsigned long pad = stack_maxrandom_size() + stack_guard_gap;
unsigned long gap_min, gap_max;
/* Values close to RLIM_INFINITY can overflow. */
if (gap + pad > gap)
@ -61,13 +60,7 @@ static inline unsigned long mmap_base(unsigned long rnd,
* Top of mmap area (just below the process stack).
* Leave at least a ~128 MB hole.
*/
gap_min = SZ_128M;
gap_max = (STACK_TOP / 6) * 5;
if (gap < gap_min)
gap = gap_min;
else if (gap > gap_max)
gap = gap_max;
gap = clamp(gap, SZ_128M, (STACK_TOP / 6) * 5);
return PAGE_ALIGN(STACK_TOP - gap - rnd);
}