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Message-ID: <20060809103521.GK3308@elf.ucw.cz>
Date: Wed, 9 Aug 2006 12:35:21 +0200
From: Pavel Machek <pavel@...e.cz>
To: "Rafael J. Wysocki" <rjw@...k.pl>
Cc: LKML <linux-kernel@...r.kernel.org>, Linux PM <linux-pm@...l.org>
Subject: Re: [RFC][PATCH -mm 4/5] swsusp: Change the name of pagedir_nosave
On Wed 2006-08-09 12:11:34, Rafael J. Wysocki wrote:
> The name of the pagedir_nosave variable does not make sense any more, so it
> seems reasonable to change it to something more meaningful.
Yes, that name was wrong from day 0. ACK.
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
> ---
> arch/i386/power/swsusp.S | 2 +-
> arch/powerpc/kernel/swsusp_32.S | 4 ++--
> arch/x86_64/kernel/suspend_asm.S | 2 +-
> kernel/power/power.h | 2 --
> kernel/power/snapshot.c | 15 +++++++++------
> 5 files changed, 13 insertions(+), 12 deletions(-)
>
> Index: linux-2.6.18-rc3-mm2/arch/i386/power/swsusp.S
> ===================================================================
> --- linux-2.6.18-rc3-mm2.orig/arch/i386/power/swsusp.S
> +++ linux-2.6.18-rc3-mm2/arch/i386/power/swsusp.S
> @@ -32,7 +32,7 @@ ENTRY(swsusp_arch_resume)
> movl $swsusp_pg_dir-__PAGE_OFFSET, %ecx
> movl %ecx, %cr3
>
> - movl pagedir_nosave, %edx
> + movl restore_pblist, %edx
> .p2align 4,,7
>
> copy_loop:
> Index: linux-2.6.18-rc3-mm2/arch/powerpc/kernel/swsusp_32.S
> ===================================================================
> --- linux-2.6.18-rc3-mm2.orig/arch/powerpc/kernel/swsusp_32.S
> +++ linux-2.6.18-rc3-mm2/arch/powerpc/kernel/swsusp_32.S
> @@ -159,8 +159,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
> isync
>
> /* Load ptr the list of pages to copy in r3 */
> - lis r11,(pagedir_nosave - KERNELBASE)@h
> - ori r11,r11,pagedir_nosave@l
> + lis r11,(restore_pblist - KERNELBASE)@h
> + ori r11,r11,restore_pblist@l
> lwz r10,0(r11)
>
> /* Copy the pages. This is a very basic implementation, to
> Index: linux-2.6.18-rc3-mm2/arch/x86_64/kernel/suspend_asm.S
> ===================================================================
> --- linux-2.6.18-rc3-mm2.orig/arch/x86_64/kernel/suspend_asm.S
> +++ linux-2.6.18-rc3-mm2/arch/x86_64/kernel/suspend_asm.S
> @@ -54,7 +54,7 @@ ENTRY(restore_image)
> movq %rcx, %cr3;
> movq %rax, %cr4; # turn PGE back on
>
> - movq pagedir_nosave(%rip), %rdx
> + movq restore_pblist(%rip), %rdx
> loop:
> testq %rdx, %rdx
> jz done
> Index: linux-2.6.18-rc3-mm2/kernel/power/power.h
> ===================================================================
> --- linux-2.6.18-rc3-mm2.orig/kernel/power/power.h
> +++ linux-2.6.18-rc3-mm2/kernel/power/power.h
> @@ -38,8 +38,6 @@ extern struct subsystem power_subsys;
> /* References to section boundaries */
> extern const void __nosave_begin, __nosave_end;
>
> -extern struct pbe *pagedir_nosave;
> -
> /* Preferred image size in bytes (default 500 MB) */
> extern unsigned long image_size;
> extern int in_suspend;
> Index: linux-2.6.18-rc3-mm2/kernel/power/snapshot.c
> ===================================================================
> --- linux-2.6.18-rc3-mm2.orig/kernel/power/snapshot.c
> +++ linux-2.6.18-rc3-mm2/kernel/power/snapshot.c
> @@ -38,8 +38,11 @@
> * the suspend and included in the suspend image, but have also been
> * allocated by the "resume" kernel, so their contents cannot be written
> * directly to their "original" page frames.
> + *
> + * NOTE: It cannot be static, because it is used by the architecture-dependent
> + * atomic restore code.
> */
> -struct pbe *pagedir_nosave;
> +struct pbe *restore_pblist;
>
> /* Pointer to an auxiliary buffer (1 page) */
> static void *buffer;
> @@ -824,7 +827,7 @@ void swsusp_free(void)
> }
> nr_copy_pages = 0;
> nr_meta_pages = 0;
> - pagedir_nosave = NULL;
> + restore_pblist = NULL;
> buffer = NULL;
> }
>
> @@ -1203,7 +1206,7 @@ load_header(struct swsusp_info *info)
> {
> int error;
>
> - pagedir_nosave = NULL;
> + restore_pblist = NULL;
> error = check_header(info);
> if (!error) {
> nr_copy_pages = info->image_pages;
> @@ -1562,8 +1565,8 @@ static void *get_buffer(struct memory_bi
> pbe->orig_address = page_address(page);
> pbe->address = safe_pages_list;
> safe_pages_list = safe_pages_list->next;
> - pbe->next = pagedir_nosave;
> - pagedir_nosave = pbe;
> + pbe->next = restore_pblist;
> + restore_pblist = pbe;
> return (void *)pbe->address;
> }
>
> @@ -1628,7 +1631,7 @@ int snapshot_write_next(struct snapshot_
>
> chain_init(&ca, GFP_ATOMIC, 1);
> bm_position_reset(&orig_bm);
> - pagedir_nosave = NULL;
> + restore_pblist = NULL;
> handle->sync_read = 0;
> handle->buffer = get_buffer(&orig_bm, &ca);
> if (!handle->buffer)
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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