mm: convert anon_vma->lock to a mutex
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / powerpc / kernel / module.c
blob49cee9df225be8bfc6b06a429ee9243d10484439
1 /* Kernel module help for powerpc.
2 Copyright (C) 2001, 2003 Rusty Russell IBM Corporation.
3 Copyright (C) 2008 Freescale Semiconductor, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #include <linux/module.h>
20 #include <linux/elf.h>
21 #include <linux/moduleloader.h>
22 #include <linux/err.h>
23 #include <linux/vmalloc.h>
24 #include <linux/bug.h>
25 #include <asm/module.h>
26 #include <asm/uaccess.h>
27 #include <asm/firmware.h>
28 #include <linux/sort.h>
30 #include "setup.h"
32 LIST_HEAD(module_bug_list);
34 void *module_alloc(unsigned long size)
36 if (size == 0)
37 return NULL;
39 return vmalloc_exec(size);
42 /* Free memory returned from module_alloc */
43 void module_free(struct module *mod, void *module_region)
45 vfree(module_region);
48 static const Elf_Shdr *find_section(const Elf_Ehdr *hdr,
49 const Elf_Shdr *sechdrs,
50 const char *name)
52 char *secstrings;
53 unsigned int i;
55 secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
56 for (i = 1; i < hdr->e_shnum; i++)
57 if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
58 return &sechdrs[i];
59 return NULL;
62 int module_finalize(const Elf_Ehdr *hdr,
63 const Elf_Shdr *sechdrs, struct module *me)
65 const Elf_Shdr *sect;
67 /* Apply feature fixups */
68 sect = find_section(hdr, sechdrs, "__ftr_fixup");
69 if (sect != NULL)
70 do_feature_fixups(cur_cpu_spec->cpu_features,
71 (void *)sect->sh_addr,
72 (void *)sect->sh_addr + sect->sh_size);
74 sect = find_section(hdr, sechdrs, "__mmu_ftr_fixup");
75 if (sect != NULL)
76 do_feature_fixups(cur_cpu_spec->mmu_features,
77 (void *)sect->sh_addr,
78 (void *)sect->sh_addr + sect->sh_size);
80 #ifdef CONFIG_PPC64
81 sect = find_section(hdr, sechdrs, "__fw_ftr_fixup");
82 if (sect != NULL)
83 do_feature_fixups(powerpc_firmware_features,
84 (void *)sect->sh_addr,
85 (void *)sect->sh_addr + sect->sh_size);
86 #endif
88 sect = find_section(hdr, sechdrs, "__lwsync_fixup");
89 if (sect != NULL)
90 do_lwsync_fixups(cur_cpu_spec->cpu_features,
91 (void *)sect->sh_addr,
92 (void *)sect->sh_addr + sect->sh_size);
94 return 0;
97 void module_arch_cleanup(struct module *mod)