diff options
Diffstat (limited to 'include/acpi/acmacros.h')
| -rw-r--r-- | include/acpi/acmacros.h | 58 |
1 files changed, 54 insertions, 4 deletions
diff --git a/include/acpi/acmacros.h b/include/acpi/acmacros.h index 702cc4e57f5f..258cfe5e2aac 100644 --- a/include/acpi/acmacros.h +++ b/include/acpi/acmacros.h @@ -525,6 +525,9 @@ * bad form, but having a separate exit macro is very ugly and difficult to maintain. * One of the FUNCTION_TRACE macros above must be used in conjunction with these macros * so that "_acpi_function_name" is defined. + * + * Note: the DO_WHILE0 macro is used to prevent some compilers from complaining + * about these constructs. */ #ifdef ACPI_USE_DO_WHILE_0 #define ACPI_DO_WHILE0(a) do a while(0) @@ -532,10 +535,55 @@ #define ACPI_DO_WHILE0(a) a #endif -#define return_VOID ACPI_DO_WHILE0 ({acpi_ut_exit(ACPI_DEBUG_PARAMETERS);return;}) -#define return_ACPI_STATUS(s) ACPI_DO_WHILE0 ({acpi_ut_status_exit(ACPI_DEBUG_PARAMETERS,(s));return((s));}) -#define return_VALUE(s) ACPI_DO_WHILE0 ({acpi_ut_value_exit(ACPI_DEBUG_PARAMETERS,(acpi_integer)(s));return((s));}) -#define return_PTR(s) ACPI_DO_WHILE0 ({acpi_ut_ptr_exit(ACPI_DEBUG_PARAMETERS,(u8 *)(s));return((s));}) +#define return_VOID ACPI_DO_WHILE0 ({ \ + acpi_ut_exit (ACPI_DEBUG_PARAMETERS); \ + return;}) +/* + * There are two versions of most of the return macros. The default version is + * safer, since it avoids side-effects by guaranteeing that the argument will + * not be evaluated twice. + * + * A less-safe version of the macros is provided for optional use if the + * compiler uses excessive CPU stack (for example, this may happen in the + * debug case if code optimzation is disabled.) + */ +#ifndef ACPI_SIMPLE_RETURN_MACROS + +#define return_ACPI_STATUS(s) ACPI_DO_WHILE0 ({ \ + register acpi_status _s = (s); \ + acpi_ut_status_exit (ACPI_DEBUG_PARAMETERS, _s); \ + return (_s); }) +#define return_PTR(s) ACPI_DO_WHILE0 ({ \ + register void *_s = (void *) (s); \ + acpi_ut_ptr_exit (ACPI_DEBUG_PARAMETERS, (u8 *) _s); \ + return (_s); }) +#define return_VALUE(s) ACPI_DO_WHILE0 ({ \ + register acpi_integer _s = (s); \ + acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, _s); \ + return (_s); }) +#define return_UINT8(s) ACPI_DO_WHILE0 ({ \ + register u8 _s = (u8) (s); \ + acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, _s); \ + return (_s); }) +#define return_UINT32(s) ACPI_DO_WHILE0 ({ \ + register u32 _s = (u32) (s); \ + acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, _s); \ + return (_s); }) +#else /* Use original less-safe macros */ + +#define return_ACPI_STATUS(s) ACPI_DO_WHILE0 ({ \ + acpi_ut_status_exit (ACPI_DEBUG_PARAMETERS, (s)); \ + return((s)); }) +#define return_PTR(s) ACPI_DO_WHILE0 ({ \ + acpi_ut_ptr_exit (ACPI_DEBUG_PARAMETERS, (u8 *) (s)); \ + return((s)); }) +#define return_VALUE(s) ACPI_DO_WHILE0 ({ \ + acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (acpi_integer) (s)); \ + return((s)); }) +#define return_UINT8(s) return_VALUE(s) +#define return_UINT32(s) return_VALUE(s) + +#endif /* ACPI_SIMPLE_RETURN_MACROS */ /* Conditional execution */ @@ -612,6 +660,8 @@ #define return_VOID return #define return_ACPI_STATUS(s) return(s) #define return_VALUE(s) return(s) +#define return_UINT8(s) return(s) +#define return_UINT32(s) return(s) #define return_PTR(s) return(s) #endif |