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param: don't deref arg in __same_type() checks

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gcc allows this when arg is a function, but sparse complains:

drivers/char/ipmi/ipmi_watchdog.c:303:1: error: cannot dereference this type
drivers/char/ipmi/ipmi_watchdog.c:307:1: error: cannot dereference this type
drivers/char/ipmi/ipmi_watchdog.c:311:1: error: cannot dereference this type

Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Tested-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2010-08-11 23:04:40 -06:00
parent 4ef2db016a
commit a6de51b278
1 changed files with 5 additions and 5 deletions
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10
include/linux/moduleparam.h
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@ -125,7 +125,7 @@ struct kparam_array
*/
#define module_param_cb(name, ops, arg, perm) \
__module_param_call(MODULE_PARAM_PREFIX, \
name, ops, arg, __same_type(*(arg), bool), perm)
name, ops, arg, __same_type((arg), bool *), perm)
/* On alpha, ia64 and ppc64 relocations to global data cannot go into
read-only sections (which is part of respective UNIX ABI on these
@ -157,7 +157,7 @@ struct kparam_array
{ (void *)set, (void *)get }; \
__module_param_call(MODULE_PARAM_PREFIX, \
name, &__param_ops_##name, arg, \
__same_type(*(arg), bool), \
__same_type(arg, bool *), \
(perm) + sizeof(__check_old_set_param(set))*0)
/* We don't get oldget: it's often a new-style param_get_uint, etc. */
@ -330,9 +330,9 @@ extern int param_get_bool(char *buffer, const struct kernel_param *kp);
#define param_check_bool(name, p) \
static inline void __check_##name(void) \
{ \
BUILD_BUG_ON(!__same_type(*(p), bool) && \
!__same_type(*(p), unsigned int) && \
!__same_type(*(p), int)); \
BUILD_BUG_ON(!__same_type((p), bool *) && \
!__same_type((p), unsigned int *) && \
!__same_type((p), int *)); \
}
extern struct kernel_param_ops param_ops_invbool;