From 3624eb04c24861ab296842414f9752a393e68372 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 4 Oct 2010 22:08:12 +0200 Subject: [PATCH] PM / Hibernate: Modify signature used to mark swap Since we are adding compression to the kernel's hibernate code, change signature used by it to mark swap spaces, so that earlier kernels don't attempt to restore compressed images they cannot handle. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek --- kernel/power/swap.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/power/swap.c b/kernel/power/swap.c index 2dfa87869b49..916eaa790399 100644 --- a/kernel/power/swap.c +++ b/kernel/power/swap.c @@ -29,7 +29,7 @@ #include "power.h" -#define SWSUSP_SIG "S1SUSPEND" +#define HIBERNATE_SIG "LINHIB0001" /* * The swap map is a data structure used for keeping track of each page @@ -195,7 +195,7 @@ static int mark_swapfiles(struct swap_map_handle *handle, unsigned int flags) if (!memcmp("SWAP-SPACE",swsusp_header->sig, 10) || !memcmp("SWAPSPACE2",swsusp_header->sig, 10)) { memcpy(swsusp_header->orig_sig,swsusp_header->sig, 10); - memcpy(swsusp_header->sig,SWSUSP_SIG, 10); + memcpy(swsusp_header->sig, HIBERNATE_SIG, 10); swsusp_header->image = handle->first_sector; swsusp_header->flags = flags; error = hib_bio_write_page(swsusp_resume_block, @@ -916,7 +916,7 @@ int swsusp_check(void) if (error) goto put; - if (!memcmp(SWSUSP_SIG, swsusp_header->sig, 10)) { + if (!memcmp(HIBERNATE_SIG, swsusp_header->sig, 10)) { memcpy(swsusp_header->sig, swsusp_header->orig_sig, 10); /* Reset swap signature now */ error = hib_bio_write_page(swsusp_resume_block, -- 2.20.1