On 03/23/2015 03:18 PM, Steven Rostedt wrote: > On Sat, 21 Mar 2015 21:44:37 +0100 > Denys Vlasenko <[email protected]> wrote: > >> Instead of PER_CPU_VAR(kernel_stack), 64-bit code >> can use PER_CPU_VAR(cpu_tss + TSS_sp0). > > The change log here is lacking an answer to "why". It only states what > it does. What's wrong with using kernel_stack? The change log should > explicitly state that. I have no idea why this patch is needed.
Sorry. The reason is: We want to get rid of kernel_stack, since it is redundant: in 64-bits, PER_CPU_VAR(cpu_tss + TSS_sp0) can be used instead, in 32-bits, PER_CPU_VAR(cpu_current_top_of_stack) can be used instead. Patch 2/2 in the same series removes kernel_stack. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
