Hi Greg, вс, 8 июл. 2018 г. в 21:40, Greg KH <greg@xxxxxxxxx>: > > On Sun, Jul 08, 2018 at 08:56:21PM +0300, Alexey Brodkin wrote: > > Depending on ABI "long long" type of a particular 32-bit CPU > > might be aligned by either word (32-bits) or double word (64-bits). > > Make sure "data" is really 64-bit aligned for any 32-bit CPU. > > > > At least for 32-bit ARC cores ABI requires "long long" types > > to be aligned by normal 32-bit word. This makes "data" field aligned to > > 12 bytes. Which is still OK as long as we use 32-bit data only. > > > > But once we want to use native atomic64_t type (i.e. when we use special > > instructions LLOCKD/SCONDD for accessing 64-bit data) we easily hit > > misaligned access exception. > > > > That's because even on CPUs capable of non-aligned data access LL/SC > > instructions require strict alignment. > > > > Signed-off-by: Alexey Brodkin <abrodkin@xxxxxxxxxxxx> > > Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > > Cc: stable@xxxxxxxxxxxxxxx > > --- > > > > Changes v1 -> v2: > > > > * Reworded commit message > > * Inserted comment right in source [Thomas] > > > > drivers/base/devres.c | 8 ++++++-- > > 1 file changed, 6 insertions(+), 2 deletions(-) > > Always use scripts/get_maintainer.pl to properly cc: the needed > developer/maintainer. As it is, this patch is going to get dropped on > the floor, sorry... Right I was way too relaxed dealing with very generic stuff which might get not that much of attention as more narrow topics or subsystems. But anyways get_maintainer.pl says you're the guy so do I need to do anything extra still or it's OK for this time? -Alexey
