Remove the comment about being unable to detect __builtin_unreachable. __builtin_unreachable was implemented in the GCC 4.5 timeframe. The kernel's minimum supported version of GCC is 4.6 since commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6"). Commit cb984d101b30 ("compiler-gcc: integrate the various compiler-gcc[345].h files") shows that unreachable() had different guards based on GCC version.
Unified · Split
| @@ -96,10 +96,6 @@ · 95 unmodified lines | ||
| 96 | 96 | * Mark a position in code as unreachable. This can be used to |
| 97 | 97 | * suppress control flow warnings after asm blocks that transfer |
| 98 | 98 | * control elsewhere. |
| 99 | − * | |
| 100 | − * Early snapshots of gcc 4.5 don't support this and we can't detect | |
| 101 | − * this in the preprocessor, but we can live with this because they're | |
| 102 | − * unreleased. Really, we need to have autoconf for the kernel. | |
| 103 | 99 | */ |
| 104 | 100 | #define unreachable() \ |
| 105 | 101 | do { \ |