Messages in this thread | | | Date | Thu, 24 Oct 2019 19:40:44 +0200 | From | Peter Zijlstra <> | Subject | Re: [patch V2 08/17] x86/entry: Move syscall irq tracing to C code |
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On Thu, Oct 24, 2019 at 09:24:13AM -0700, Andy Lutomirski wrote: > On Wed, Oct 23, 2019 at 2:30 PM Andy Lutomirski <luto@kernel.org> wrote: > > > > On Wed, Oct 23, 2019 at 5:31 AM Thomas Gleixner <tglx@linutronix.de> wrote: > > > > > > Interrupt state tracing can be safely done in C code. The few stack > > > operations in assembly do not need to be covered. > > > > > > Remove the now pointless indirection via .Lsyscall_32_done and jump to > > > swapgs_restore_regs_and_return_to_usermode directly. > > > > This doesn't look right. > > Well, I feel a bit silly. I read this: > > > > > > #define SYSCALL_EXIT_WORK_FLAGS \ > > > @@ -279,6 +282,9 @@ static void syscall_slow_exit_work(struc > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > and I applied the diff in my head to the wrong function, and I didn't > notice that it didn't really apply there. Oddly, gitweb gets this
I had the same when reviewing these patches; I was almost going to ask tglx about it on IRC when the penny dropped.
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