AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

module: Remove set_all_modules_text_*()

Browse Source 
Now that there are no users of set_all_modules_text_*() left, remove
it.

While it appears nds32 uses it, it does not have STRICT_MODULE_RWX and
therefore ends up with the NOP stubs.

Tested-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincent Chen <deanbo422@gmail.com>
Link: https://lkml.kernel.org/r/20191111132458.284298307@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2019-10-15 21:07:31 +02:00 committed by Ingo Molnar
parent 5a735583b7
commit 958de66819
3 changed files with 0 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/nds32/kernel/ftrace.c
View File

@ -89,18 +89,6 @@ int __init ftrace_dyn_arch_init(void)
return 0;
}
int ftrace_arch_code_modify_prepare(void)
{
set_all_modules_text_rw();
return 0;
}
int ftrace_arch_code_modify_post_process(void)
{
set_all_modules_text_ro();
return 0;
}
static unsigned long gen_sethi_insn(unsigned long addr)
{
unsigned long opcode = 0x46000000;

4
include/linux/module.h
View File

@ -846,13 +846,9 @@ extern int module_sysfs_initialized;
#define __MODULE_STRING(x) __stringify(x)
#ifdef CONFIG_STRICT_MODULE_RWX
extern void set_all_modules_text_rw(void);
extern void set_all_modules_text_ro(void);
extern void module_enable_ro(const struct module *mod, bool after_init);
extern void module_disable_ro(const struct module *mod);
#else
static inline void set_all_modules_text_rw(void) { }
static inline void set_all_modules_text_ro(void) { }
static inline void module_enable_ro(const struct module *mod, bool after_init) { }
static inline void module_disable_ro(const struct module *mod) { }
#endif

43
kernel/module.c
View File

@ -2029,49 +2029,6 @@ static void module_enable_nx(const struct module *mod)
frob_writable_data(&mod->init_layout, set_memory_nx);
}
/* Iterate through all modules and set each module's text as RW */
void set_all_modules_text_rw(void)
{
struct module *mod;
if (!rodata_enabled)
return;
mutex_lock(&module_mutex);
list_for_each_entry_rcu(mod, &modules, list) {
if (mod->state == MODULE_STATE_UNFORMED)
continue;
frob_text(&mod->core_layout, set_memory_rw);
frob_text(&mod->init_layout, set_memory_rw);
}
mutex_unlock(&module_mutex);
}
/* Iterate through all modules and set each module's text as RO */
void set_all_modules_text_ro(void)
{
struct module *mod;
if (!rodata_enabled)
return;
mutex_lock(&module_mutex);
list_for_each_entry_rcu(mod, &modules, list) {
/*
* Ignore going modules since it's possible that ro
* protection has already been disabled, otherwise we'll
* run into protection faults at module deallocation.
*/
if (mod->state == MODULE_STATE_UNFORMED ||
mod->state == MODULE_STATE_GOING)
continue;
frob_text(&mod->core_layout, set_memory_ro);
frob_text(&mod->init_layout, set_memory_ro);
}
mutex_unlock(&module_mutex);
}
#else /* !CONFIG_STRICT_MODULE_RWX */
static void module_enable_nx(const struct module *mod) { }
#endif /* CONFIG_STRICT_MODULE_RWX */