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// RUN: %check_clang_tidy %s linuxkernel-must-check-errs %t
#define __must_check __attribute__((warn_unused_result))
// Prototypes of the error functions.
void * __must_check ERR_PTR(long error);
long __must_check PTR_ERR(const void *ptr);
int __must_check IS_ERR(const void *ptr);
int __must_check IS_ERR_OR_NULL(const void *ptr);
void * __must_check ERR_CAST(const void *ptr);
int __must_check PTR_ERR_OR_ZERO(const void *ptr);
void f(void) {
ERR_PTR(0);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: result from function 'ERR_PTR' is unused
PTR_ERR((void *)0);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: result from function 'PTR_ERR' is unused
IS_ERR((void *)0);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: result from function 'IS_ERR' is unused
ERR_CAST((void *)0);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: result from function 'ERR_CAST' is unused
out:
PTR_ERR_OR_ZERO((void *)0);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: result from function 'PTR_ERR_OR_ZERO' is unused
}
void *f1(void) {
return ERR_PTR(0);
}
long f2(void) {
if (IS_ERR((void *)0)) {
return PTR_ERR((void *)0);
}
return -1;
}
void f3(void) {
f1();
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: result from function 'f1' is unused but represents an error value
f2();
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: result from function 'f2' is unused but represents an error value
}
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