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x86/mm: Replace open-coded gap bounding with clamp()

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Rather than manually bounding gap between gap_min and gap_max,
use the well-known clamp() macro to make the code easier to read.

Signed-off-by: Qasim Ijaz <qasdev00@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250215125249.10729-1-qasdev00@gmail.com
This commit is contained in:
Qasim Ijaz 2025-02-15 12:52:49 +00:00 committed by Ingo Molnar
parent 81256a50aa
commit 282f395244
1 changed files with 1 additions and 8 deletions
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9
arch/x86/mm/mmap.c
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@ -84,7 +84,6 @@ static unsigned long mmap_base(unsigned long rnd, unsigned long task_size,
{
unsigned long gap = rlim_stack->rlim_cur;
unsigned long pad = stack_maxrandom_size(task_size) + stack_guard_gap;
unsigned long gap_min, gap_max;
/* Values close to RLIM_INFINITY can overflow. */
if (gap + pad > gap)
@ -94,13 +93,7 @@ static unsigned long mmap_base(unsigned long rnd, unsigned long task_size,
* Top of mmap area (just below the process stack).
* Leave an at least ~128 MB hole with possible stack randomization.
*/
gap_min = SIZE_128M;
gap_max = (task_size / 6) * 5;
if (gap < gap_min)
gap = gap_min;
else if (gap > gap_max)
gap = gap_max;
gap = clamp(gap, SIZE_128M, (task_size / 6) * 5);
return PAGE_ALIGN(task_size - gap - rnd);
}