shmem.c (1bdd3e05a0a3b4a97ea88bc46fef8fb265c8b94c) shmem.c (991589974d9c9ecb24ee3799ec8c415c730598a2)
1/*
2 * Resizable virtual memory filesystem for Linux.
3 *
4 * Copyright (C) 2000 Linus Torvalds.
5 * 2000 Transmeta Corp.
6 * 2000-2001 Christoph Rohland
7 * 2000-2001 SAP AG
8 * 2002 Red Hat Inc.

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2102 return addr;
2103 if (len < HPAGE_PMD_SIZE)
2104 return addr;
2105 if (flags & MAP_FIXED)
2106 return addr;
2107 /*
2108 * Our priority is to support MAP_SHARED mapped hugely;
2109 * and support MAP_PRIVATE mapped hugely too, until it is COWed.
1/*
2 * Resizable virtual memory filesystem for Linux.
3 *
4 * Copyright (C) 2000 Linus Torvalds.
5 * 2000 Transmeta Corp.
6 * 2000-2001 Christoph Rohland
7 * 2000-2001 SAP AG
8 * 2002 Red Hat Inc.

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2102 return addr;
2103 if (len < HPAGE_PMD_SIZE)
2104 return addr;
2105 if (flags & MAP_FIXED)
2106 return addr;
2107 /*
2108 * Our priority is to support MAP_SHARED mapped hugely;
2109 * and support MAP_PRIVATE mapped hugely too, until it is COWed.
2110 * But if caller specified an address hint, respect that as before.
2110 * But if caller specified an address hint and we allocated area there
2111 * successfully, respect that as before.
2111 */
2112 */
2112 if (uaddr)
2113 if (uaddr == addr)
2113 return addr;
2114
2115 if (shmem_huge != SHMEM_HUGE_FORCE) {
2116 struct super_block *sb;
2117
2118 if (file) {
2119 VM_BUG_ON(file->f_op != &shmem_file_operations);
2120 sb = file_inode(file)->i_sb;

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2138 return addr;
2139
2140 inflated_len = len + HPAGE_PMD_SIZE - PAGE_SIZE;
2141 if (inflated_len > TASK_SIZE)
2142 return addr;
2143 if (inflated_len < len)
2144 return addr;
2145
2114 return addr;
2115
2116 if (shmem_huge != SHMEM_HUGE_FORCE) {
2117 struct super_block *sb;
2118
2119 if (file) {
2120 VM_BUG_ON(file->f_op != &shmem_file_operations);
2121 sb = file_inode(file)->i_sb;

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2139 return addr;
2140
2141 inflated_len = len + HPAGE_PMD_SIZE - PAGE_SIZE;
2142 if (inflated_len > TASK_SIZE)
2143 return addr;
2144 if (inflated_len < len)
2145 return addr;
2146
2146 inflated_addr = get_area(NULL, 0, inflated_len, 0, flags);
2147 inflated_addr = get_area(NULL, uaddr, inflated_len, 0, flags);
2147 if (IS_ERR_VALUE(inflated_addr))
2148 return addr;
2149 if (inflated_addr & ~PAGE_MASK)
2150 return addr;
2151
2152 inflated_offset = inflated_addr & (HPAGE_PMD_SIZE-1);
2153 inflated_addr += offset - inflated_offset;
2154 if (inflated_offset > offset)

--- 2083 unchanged lines hidden --- 		2148 if (IS_ERR_VALUE(inflated_addr))
2149 return addr;
2150 if (inflated_addr & ~PAGE_MASK)
2151 return addr;
2152
2153 inflated_offset = inflated_addr & (HPAGE_PMD_SIZE-1);
2154 inflated_addr += offset - inflated_offset;
2155 if (inflated_offset > offset)

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