lkml.org 
[lkml]   [2008]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [crash, bisected] Re: [PATCH 3/4] x86_64: Fold pda into per cpu area

>>>>
>>>> To initialize the percpu data you do want to talk to the virtual address
>>>> at __per_coup_load. But it is absolute Ugh.
>>>> It might be worth saying something like.
>>>> .data.percpu.start : AT(.data.percpu.dummy - LOAD_OFFSET) {
>>>> DATA(0) . = ALIGN(align);
>>>> __per_cpu_load = . ; }
>>>> To make __per_cpu_load a relative symbol. ld has a bad habit of taking
>>>> symbols out of empty sections and making them absolute. Which is why
>>>> I added the DATA(0).

The syntax error is at this "DATA(0)" statement. I don't find this as a
linker script command or a macro. What is it we're trying to do with this?

Thanks,
Mike
...
>>> I'm not sure I understand the linker lingo enough to fill in the rest
>>> of the blanks... I've tried various versions around this framework and
>>> none have been accepted yet.
>>>
>>> #ifdef CONFIG_HAVE_ZERO_BASED_PER_CPU
>>> #define PERCPU(align) \
>>> .data.percpu.start : AT(.data.percpu.dummy - LOAD_OFFSET) { \
>>> DATA(0) \
>>> . = ALIGN(align); \
>>> __per_cpu_load = .; \
>>> *(.data.percpu.first) \
>>> *(.data.percpu.shared_aligned) \
>>> *(.data.percpu) \
>>> *(.data.percpu.page_aligned) \
>>> ____per_cpu_size = . - __per_cpu_load \
>>> } \
>>> #else


\
 
 \ /
  Last update: 2008-06-23 20:39    [W:0.139 / U:1.264 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site