From c972cc60c23f5a6309292bfcc91a441743ba027e Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Fri, 5 Oct 2012 16:52:18 +0200 Subject: 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 Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/module.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/s390/kernel/module.c') diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c index 46412b1d7e1e..4610deafd953 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) { -- cgit v1.2.3