On Sun, Aug 06, 2017 at 03:09:21PM -0700, James Bottomley wrote: > On Sun, 2017-08-06 at 23:42 +0300, Mikko Rapeli wrote: > > Hi, > > > > On Sun, Aug 06, 2017 at 11:22:53AM -0700, James Bottomley wrote: > > > > > > On Sun, 2017-08-06 at 18:43 +0200, Mikko Rapeli wrote: > > > > > > > > Fixes userspace compilation errors like: > > > > > > > > scsi/scsi_netlink_fc.h:60:2: error: expected specifier-qualifier- > > > > list before ‘uint64_t’ > > > > > > Rather than patching the kernel, why not #include <stdint.h> in > > > your userspace programme? > > > > The userspace program is actually a test which checks that uapi > > headers compile alone because several headers are not compiling at > > all and/or require special tricks. The test is available here: > > > > http://marc.info/?l=linux-kernel&m=150203944104544&w=2 > > But you don't seem to be detecting or fixing an existing problem. > These types are width unambiguous and all current consumers of these > headers include stdint.h so you're churning the kernel for a problem > which doesn't currently exist for any consumer of this header. The header file dependencies of scsi/scsi_netlink_fc.h are not explicit. I will propose a patch which includes <stdint.h> in userspace then. > I can agree not adding any more external uint<x>_t types for newly > exported headers so new consumers don't depend on an external standard > is reasonable, so checkpatch should warn if someone tries to add them; > I just don't see the benefit of going over the whole kernel changing > stuff that has worked fine for years. Now if you can tell me there's > an actual bug somewhere, that's different ... Tools parsing and checking uapi headers need to be able to compile them and thus need the explicit list of dependencies. If <stdint.h> is a required dependency, then scsi/scsi_netlink_fc.h should include it. scsi/scsi_netlink_fc.h is one of 42 problematic headers left in current kernel and I want to fix it one way or the other. -Mikko
