| // 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() { |
| 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() { |
| return ERR_PTR(0); |
| } |
| |
| long f2() { |
| if (IS_ERR((void *)0)) { |
| return PTR_ERR((void *)0); |
| } |
| return -1; |
| } |
| |
| void f3() { |
| 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 |
| } |