arch/s390/include/asm/bug.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_S390_BUG_H
   3 #define _ASM_S390_BUG_H
   4
   5 #include <linux/kernel.h>
   6
   7 #ifdef CONFIG_BUG
   8
   9 #ifdef CONFIG_DEBUG_BUGVERBOSE
  10
  11 #define __EMIT_BUG(x) do {                                      \
  12         asm volatile(                                           \
  13                 "0:     j       0b+2\n"                         \
  14                 "1:\n"                                          \
  15                 ".section .rodata.str,\"aMS\",@progbits,1\n"    \
  16                 "2:     .asciz  \""__FILE__"\"\n"               \
  17                 ".previous\n"                                   \
  18                 ".section __bug_table,\"aw\"\n"                 \
  19                 "3:     .long   1b-3b,2b-3b\n"                  \
  20                 "       .short  %0,%1\n"                        \
  21                 "       .org    3b+%2\n"                        \
  22                 ".previous\n"                                   \
  23                 : : "i" (__LINE__),                             \
  24                     "i" (x),                                    \
  25                     "i" (sizeof(struct bug_entry)));            \
  26 } while (0)
  27
  28 #else /* CONFIG_DEBUG_BUGVERBOSE */
  29
  30 #define __EMIT_BUG(x) do {                              \
  31         asm volatile(                                   \
  32                 "0:     j       0b+2\n"                 \
  33                 "1:\n"                                  \
  34                 ".section __bug_table,\"aw\"\n"         \
  35                 "2:     .long   1b-2b\n"                \
  36                 "       .short  %0\n"                   \
  37                 "       .org    2b+%1\n"                \
  38                 ".previous\n"                           \
  39                 : : "i" (x),                            \
  40                     "i" (sizeof(struct bug_entry)));    \
  41 } while (0)
  42
  43 #endif /* CONFIG_DEBUG_BUGVERBOSE */
  44
  45 #define BUG() do {                                      \
  46         __EMIT_BUG(0);                                  \
  47         unreachable();                                  \
  48 } while (0)
  49
  50 #define __WARN_FLAGS(flags) do {                        \
  51         __EMIT_BUG(BUGFLAG_WARNING|(flags));            \
  52 } while (0)
  53
  54 #define WARN_ON(x) ({                                   \
  55         int __ret_warn_on = !!(x);                      \
  56         if (__builtin_constant_p(__ret_warn_on)) {      \
  57                 if (__ret_warn_on)                      \
  58                         __WARN();                       \
  59         } else {                                        \
  60                 if (unlikely(__ret_warn_on))            \
  61                         __WARN();                       \
  62         }                                               \
  63         unlikely(__ret_warn_on);                        \
  64 })
  65
  66 #define HAVE_ARCH_BUG
  67 #define HAVE_ARCH_WARN_ON
  68 #endif /* CONFIG_BUG */
  69
  70 #include <asm-generic/bug.h>
  71
  72 #endif /* _ASM_S390_BUG_H */