A recent addition to the DRM tree for 4.7 added 'extern "C"' guards for c++ to all the DRM headers, and that now causes warnings in 'make headers_check': usr/include/drm/amdgpu_drm.h:38: userspace cannot reference function or variable defined in the kernel usr/include/drm/drm.h:63: userspace cannot reference function or variable defined in the kernel usr/include/drm/drm.h:699: userspace cannot reference function or variable defined in the kernel usr/include/drm/drm_fourcc.h:30: userspace cannot reference function or variable defined in the kernel usr/include/drm/drm_mode.h:33: userspace cannot reference function or variable defined in the kernel usr/include/drm/drm_sarea.h:38: userspace cannot reference function or variable defined in the kernel usr/include/drm/exynos_drm.h:21: userspace cannot reference function or variable defined in the kernel usr/include/drm/i810_drm.h:7: userspace cannot reference function or variable defined in the kernel This changes the headers_check.pl script to not warn about this. I'm listing the merge commit as introducing the problem, because there are several patches in this branch that each do this for one file.
Unified · Split
| @@ -69,6 +69,10 @@ sub check_declarations · 68 unmodified lines | ||
| 69 | 69 | if ($line =~ m/^void seqbuf_dump\(void\);/) { |
| 70 | 70 | return; |
| 71 | 71 | } |
| 72 | + # drm headers are being C++ friendly | |
| 73 | + if ($line =~ m/^extern "C"/) { | |
| 74 | + return; | |
| 75 | + } | |
| 72 | 76 | if ($line =~ m/^(\s*extern|unsigned|char|short|int|long|void)\b/) { |
| 73 | 77 | printf STDERR "$filename:$lineno: " . |
| 74 | 78 | "userspace cannot reference function or " . |