kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

module: remove module_text_address()

Browse source 
Impact: Replace and remove risky (non-EXPORTed) API

module_text_address() returns a pointer to the module, which given locking
improvements in module.c, is useless except to test for NULL:

1) If the module can't go away, use __module_text_address.
2) Otherwise, just use is_module_text_address().

Cc: linux-mtd@lists.infradead.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2009-03-31 13:05:31 -06:00
parent e610499e26
commit a6e6abd575
4 changed files with 9 additions and 25 deletions
Download patch file Download diff file Expand all files Collapse all files

6
kernel/extable.c
View file

@ -58,14 +58,14 @@ __notrace_funcgraph int __kernel_text_address(unsigned long addr)
{
if (core_kernel_text(addr))
return 1;
return __module_text_address(addr) != NULL;
return is_module_text_address(addr);
}
int kernel_text_address(unsigned long addr)
{
if (core_kernel_text(addr))
return 1;
return module_text_address(addr) != NULL;
return is_module_text_address(addr);
}
/*
@ -81,5 +81,5 @@ int func_ptr_is_kernel_text(void *ptr)
addr = (unsigned long) dereference_function_descriptor(ptr);
if (core_kernel_text(addr))
return 1;
return module_text_address(addr) != NULL;
return is_module_text_address(addr);
}

17
kernel/module.c
View file

@ -908,8 +908,10 @@ void symbol_put_addr(void *addr)
if (core_kernel_text((unsigned long)addr))
return;
if (!(modaddr = module_text_address((unsigned long)addr)))
BUG();
/* module_text_address is safe here: we're supposed to have reference
* to module from symbol_get, so it can't go away. */
modaddr = __module_text_address((unsigned long)addr);
BUG_ON(!modaddr);
module_put(modaddr);
}
EXPORT_SYMBOL_GPL(symbol_put_addr);
@ -2821,17 +2823,6 @@ struct module *__module_text_address(unsigned long addr)
return mod;
}
struct module *module_text_address(unsigned long addr)
{
struct module *mod;
preempt_disable();
mod = __module_text_address(addr);
preempt_enable();
return mod;
}
/* Don't grab lock, we're oopsing. */
void print_modules(void)
{