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. -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project -- 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
