Hi Stephen, 2017-07-21 2:52 GMT+09:00 Stephen Boyd <sboyd@xxxxxxxxxxxxxx>: > On 07/20, Masahiro Yamada wrote: >> Hi Stephen, Rob, >> >> 2017-07-01 8:59 GMT+09:00 Rob Clark <robdclark@xxxxxxxxx>: >> > On Fri, Jun 30, 2017 at 6:58 PM, Stephen Boyd <sboyd@xxxxxxxxxxxxxx> wrote: >> >> If we have a structure that's marked const it will be placed >> >> into the .rodata section but it could reference an init section >> >> function. Include the read only data section in the check we have >> >> for read/write data sections referencing init sections so we can >> >> find this class of problems. This exposes quite a few places >> >> where const marked structures are referencing __init functions and >> >> __init data that we were previously ignoring. >> >> >> >> Cc: Rob Clark <robdclark@xxxxxxxxx> >> >> Cc: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> >> >> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx> >> >> --- >> >> >> >> Making this change leads to quite a few other errors even on the >> >> multi_v7_defconfig for ARM[1]. I still need to do a build of the >> >> allmodconfig to see how many other errors there, but it seems to >> >> be quite a few. I suppose those will need to be fixed before we can >> >> merge this? >> > >> > thanks.. the explosions you get with these mistakes when building >> > drivers as modules in a distro kernel config are quite "fun" to >> > debug.. >> > >> > I'm not quite sure about the rules for whether merging this would >> > count as a regression, but I would argue those drivers are already >> > broken, just no one noticed yet. Similar to when a new gcc gets more >> > clever about detecting bugs. So I wouldn't be against merging this >> > first to force drivers to fix their crap ;-) >> >> I applied this, but this way seems unacceptable. >> I cannot send a pull-req for this >> unless most of the warnings are fixed. >> >> Is there any activity for driver fixes? > > Sorry, no. I've only had a little time to look at the errors > reported. Some of them seem to be noise, because there are > structures that have a handful of members where one of the > members points to an __init function or piece of data that is > only used in __init code. We would need to mark these structures > as __ref or write more complicated section mismatch checking code > to be silent in these cases. OK. I will drop this patch for now. -- Best Regards Masahiro Yamada -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
