| 1 | |
| 2 | * This file is subject to the terms and conditions of the GNU General Public
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| 3 | * License. See the file "COPYING" in the main directory of this archive
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| 4 | * for more details.
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| 5 |
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| 6 | #include <linux/export.h>
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| 7 | #include <linux/mm.h>
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| 8 | #include <linux/string.h>
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| 9 | #include <asm/pgalloc.h>
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| 10 |
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| 11 | pgd_t *pgd_alloc(struct mm_struct *mm)
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| 12 | {
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| 13 | pgd_t *init, *ret;
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| 14 |
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| 15 | ret = __pgd_alloc(mm, PGD_TABLE_ORDER);
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| 16 | if (ret) {
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| 17 | init = pgd_offset(&init_mm, 0UL);
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| 18 | pgd_init(ret);
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| 19 | memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
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| 20 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
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| 21 | }
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| 22 |
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| 23 | return ret;
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| 24 | }
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| 25 | EXPORT_SYMBOL_GPL(pgd_alloc);
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