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Schoenherr" , Usama Arif , Anthony Yznaga , Stanislav Kinsburskii , , , Subject: [RFC 06/18] init: Add liveupdate cmdline param Date: Mon, 5 Feb 2024 12:01:51 +0000 Message-ID: <20240205120203.60312-7-jgowans@amazon.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240205120203.60312-1-jgowans@amazon.com> References: <20240205120203.60312-1-jgowans@amazon.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: EX19D033UWC001.ant.amazon.com (10.13.139.218) To EX19D014EUC004.ant.amazon.com (10.252.51.182) This will allow other subsystems to know when we're going a LU and hence when they should be restoring rather than reinitialising state. --- include/linux/init.h | 1 + init/main.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/include/linux/init.h b/include/linux/init.h index 266c3e1640d4..d7c68c7bfaf0 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -146,6 +146,7 @@ extern int do_one_initcall(initcall_t fn); extern char __initdata boot_command_line[]; extern char *saved_command_line; extern unsigned int saved_command_line_len; +extern bool liveupdate; extern unsigned int reset_devices; /* used by init/main.c */ diff --git a/init/main.c b/init/main.c index e24b0780fdff..7807a56c3473 100644 --- a/init/main.c +++ b/init/main.c @@ -165,6 +165,16 @@ static char *ramdisk_execute_command = "/init"; bool static_key_initialized __read_mostly; EXPORT_SYMBOL_GPL(static_key_initialized); +bool liveupdate __read_mostly; +EXPORT_SYMBOL(liveupdate); + +static int __init set_liveupdate(char *param) +{ + liveupdate = true; + return 0; +} +early_param("liveupdate", set_liveupdate); + /* * If set, this is an indication to the drivers that reset the underlying * device before going ahead with the initialization otherwise driver might