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powerpc/vdso: Remove NULL termination element in vdso_pagelist

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No need of a NULL last element in pagelists, install_special_mapping()
knows how long the list is.

Remove that element.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e58d95ab859e3cbc9bae3c9ce2959e17d2864f5d.1601197618.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2020-09-27 09:16:22 +00:00 committed by Michael Ellerman
parent abcdbd039e
commit 35c1c7c0bc
1 changed files with 2 additions and 4 deletions
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6
arch/powerpc/kernel/vdso.c
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@ -743,7 +743,7 @@ static int __init vdso_init(void)
#ifdef CONFIG_VDSO32
/* Make sure pages are in the correct state */
vdso32_pagelist = kcalloc(vdso32_pages + 2, sizeof(struct page *),
vdso32_pagelist = kcalloc(vdso32_pages + 1, sizeof(struct page *),
GFP_KERNEL);
BUG_ON(vdso32_pagelist == NULL);
for (i = 0; i < vdso32_pages; i++) {
@ -752,11 +752,10 @@ static int __init vdso_init(void)
vdso32_pagelist[i] = pg;
}
vdso32_pagelist[i++] = virt_to_page(vdso_data);
vdso32_pagelist[i] = NULL;
#endif
#ifdef CONFIG_PPC64
vdso64_pagelist = kcalloc(vdso64_pages + 2, sizeof(struct page *),
vdso64_pagelist = kcalloc(vdso64_pages + 1, sizeof(struct page *),
GFP_KERNEL);
BUG_ON(vdso64_pagelist == NULL);
for (i = 0; i < vdso64_pages; i++) {
@ -765,7 +764,6 @@ static int __init vdso_init(void)
vdso64_pagelist[i] = pg;
}
vdso64_pagelist[i++] = virt_to_page(vdso_data);
vdso64_pagelist[i] = NULL;
#endif /* CONFIG_PPC64 */
smp_wmb();