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s390/vdso: simplify vdso size calculation

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The vdso is (and must) be page aligned and its size must also be
a multiple of PAGE_SIZE. Therefore no need to round upwards.

Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2021-01-24 20:04:08 +01:00 committed by Vasily Gorbik
parent 96c0c7ae52
commit ea44de691e
1 changed files with 1 additions and 2 deletions
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3
arch/s390/kernel/vdso.c
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@ -170,8 +170,7 @@ static int __init vdso_init(void)
int i;
/* Calculate the size of the 64 bit vDSO */
vdso64_pages = ((&vdso64_end - &vdso64_start
+ PAGE_SIZE - 1) >> PAGE_SHIFT) + 1;
vdso64_pages = ((&vdso64_end - &vdso64_start) >> PAGE_SHIFT) + 1;
/* Make sure pages are in the correct state */
vdso64_pagelist = kcalloc(vdso64_pages + 1, sizeof(struct page *),