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Fix race between cat /proc/slab_allocators and rmmod

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Same story as with cat /proc/*/wchan race vs rmmod race, only
/proc/slab_allocators want more info than just symbol name.

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2007-05-08 00:28:47 -07:00 • committed by Linus Torvalds
commit a5c43dae7a
5 changed files with 61 additions and 7 deletions
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6
include/linux/kallsyms.h
View file

@ -31,6 +31,7 @@ extern int sprint_symbol(char *buffer, unsigned long address);
extern void __print_symbol(const char *fmt, unsigned long address);
int lookup_symbol_name(unsigned long addr, char *symname);
int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
#else /* !CONFIG_KALLSYMS */
@ -65,6 +66,11 @@ static inline int lookup_symbol_name(unsigned long addr, char *symname)
return -ERANGE;
}
static inline int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
{
return -ERANGE;
}
/* Stupid that this does nothing, but I didn't create this mess. */
#define __print_symbol(fmt, addr)
#endif /*CONFIG_KALLSYMS*/

6
include/linux/module.h
View file

@ -455,6 +455,7 @@ const char *module_address_lookup(unsigned long addr,
unsigned long *offset,
char **modname);
int lookup_module_symbol_name(unsigned long addr, char *symname);
int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
/* For extable.c to search modules' exception tables. */
const struct exception_table_entry *search_module_extables(unsigned long addr);
@ -531,6 +532,11 @@ static inline int lookup_module_symbol_name(unsigned long addr, char *symname)
return -ERANGE;
}
static inline int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name)
{
return -ERANGE;
}
static inline int module_get_kallsym(unsigned int symnum, unsigned long *value,
char *type, char *name,
char *module_name, int *exported)