Messages in this thread Patch in this message | | | Date | Tue, 15 Mar 2005 12:03:10 +0100 | From | Pavel Machek <> | Subject | Re: swsusp_restore crap |
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On Út 15-03-05 14:31:56, Benjamin Herrenschmidt wrote: > On Tue, 2005-03-15 at 14:24 +1100, Benjamin Herrenschmidt wrote: > > Hi Pavel ! > > > > Please kill that swsusp_restore() call that itself calls > > flush_tlb_global(), it's junk. First, the flush_tlb_global() thing is > > arch specific, and that's all swsusp_restore() does. Then, the asm just > > calls this before returning to C code, so it makes no sense to have a > > hook there. The x86 asm can have it's own call to some arch stuff if it > > wants or just do the tlb flush in asm... > > Better, here is a patch... (note: flush_tlb_global() is an x86'ism, > doesn't exist on ppc, thus breaks compile, and that has nothing to do in > the generic code imho, it should be clearly defined as the > responsibility of the asm code).
x86-64 needs this, too.... Otherwise it looks okay.
> -- > > This patch removes the quite x86-specific swsusp_restore() hook from the > generic swsusp code and moves it to arch/i386. This also fixes build on > ppc with swsusp enabled. > > Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> > > Index: linux-work/arch/i386/power/swsusp.S > =================================================================== > --- linux-work.orig/arch/i386/power/swsusp.S 2005-03-15 11:56:17.000000000 +1100 > +++ linux-work/arch/i386/power/swsusp.S 2005-03-15 14:29:09.000000000 +1100 > @@ -58,5 +58,5 @@ > movl saved_context_edi, %edi > > pushl saved_context_eflags ; popfl > - call swsusp_restore > + call __swsusp_flush_tlb > ret > Index: linux-work/arch/i386/power/cpu.c > =================================================================== > --- linux-work.orig/arch/i386/power/cpu.c 2005-03-15 11:56:17.000000000 +1100 > +++ linux-work/arch/i386/power/cpu.c 2005-03-15 14:28:26.000000000 +1100 > @@ -147,6 +147,15 @@ > __restore_processor_state(&saved_context); > } > > +asmlinkage int __swsusp_flush_tlb(void) > +{ > + BUG_ON (nr_copy_pages_check != nr_copy_pages); > + > + /* Even mappings of "global" things (vmalloc) need to be fixed */ > + __flush_tlb_global(); > + return 0; > +} > + > /* Needed by apm.c */ > EXPORT_SYMBOL(save_processor_state); > EXPORT_SYMBOL(restore_processor_state); > Index: linux-work/kernel/power/swsusp.c > =================================================================== > --- linux-work.orig/kernel/power/swsusp.c 2005-03-15 12:00:13.000000000 +1100 > +++ linux-work/kernel/power/swsusp.c 2005-03-15 14:29:19.000000000 +1100 > @@ -907,15 +907,6 @@ > } > > > -asmlinkage int swsusp_restore(void) > -{ > - BUG_ON (nr_copy_pages_check != nr_copy_pages); > - > - /* Even mappings of "global" things (vmalloc) need to be fixed */ > - __flush_tlb_global(); > - return 0; > -} > - > int swsusp_resume(void) > { > int error; >
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