Hi Greg, On Fri, Jun 21, 2013 at 05:31:04PM +0200, Gregory CLEMENT wrote: > This commit fixes the regression on Armada 370 (the kernal hang during > boot) introduced by the commit: "ARM: 7691/1: mm: kill unused > TLB_CAN_READ_FROM_L1_CACHE and use ALT_SMP instead". > > When coming out of either a Wait for Interrupt (WFI) or a Wait for > Event (WFE) IDLE states, a specific timing sensitivity exists between > the retiring WFI/WFE instructions and the newly issued subsequent > instructions. This sensitivity can result in a CPU hang scenario. The > workaround is to insert either a Data Synchronization Barrier (DSB) or > Data Memory Barrier (DMB) command immediately after the WFI/WFE > instruction. > > This commit was based on the work of Lior Amsalem, but heavily > modified to apply the errata fix dynamically according to the > processor type thanks to the suggestions of Russell King and Nicolas > Pitre. > > Signed-off-by: Gregory CLEMENT <[email protected]> > Reviewed-by: Will Deacon <[email protected]> > Cc: <[email protected]>
This patch doesn't seem to apply on any 3.10-rcX; maybe I'm doing something wrong, but could you double-check this? Thanks, -- Ezequiel García, Free Electrons Embedded Linux, Kernel and Android Engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
