diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-10-05 16:52:18 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-10-09 14:17:01 +0200 |
| commit | c972cc60c23f5a6309292bfcc91a441743ba027e (patch) | |
| tree | 04f8fc1d4e78979d28a897a90bba5c3321555967 /arch/s390/kernel/module.c | |
| parent | 021d48be48481821f6e3f53028915c0571874135 (diff) | |
s390/vmalloc: have separate modules area
Add a special module area on top of the vmalloc area, which may be only
used for modules and bpf jit generated code.
This makes sure that inter module branches will always happen without a
trampoline and in addition having all the code within a 2GB frame is
branch prediction unit friendly.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/module.c')
| -rw-r--r-- | arch/s390/kernel/module.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c index 46412b1d7e1..4610deafd95 100644 --- a/arch/s390/kernel/module.c +++ b/arch/s390/kernel/module.c @@ -44,6 +44,17 @@ #define PLT_ENTRY_SIZE 20 #endif /* CONFIG_64BIT */ +#ifdef CONFIG_64BIT +void *module_alloc(unsigned long size) +{ + if (PAGE_ALIGN(size) > MODULES_LEN) + return NULL; + return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, + GFP_KERNEL, PAGE_KERNEL, -1, + __builtin_return_address(0)); +} +#endif + /* Free memory returned from module_alloc */ void module_free(struct module *mod, void *module_region) { |