From: Linus Torvalds <torvalds@woody.osdl.org>
Date: Mon, 11 Dec 2006 17:28:46 +0000 (-0800)
Subject: Make SLES9 "get_kernel_version" work on the kernel binary again
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8993780a6e44fb4e7ed34e33458506a775356c6e;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

Make SLES9 "get_kernel_version" work on the kernel binary again

As reported by Andy Whitcroft, at least the SLES9 initrd build process
depends on getting the kernel version from the kernel binary.  It does
that by simply trawling the binary and looking for the signature of the
"linux_banner" string (the string "Linux version " to be exact. Which
is really broken in itself, but whatever..)

That got broken when the string was changed to allow /proc/version to
change the UTS release information dynamically, and "get_kernel_version"
thus returned "%s" (see commit a2ee8649ba6d71416712e798276bf7c40b64e6e5:
"[PATCH] Fix linux banner utsname information").

This just restores "linux_banner" as a static string, which should fix
the version finding.  And /proc/version simply uses a different string.

To avoid wasting even that miniscule amount of memory, the early boot
string should really be marked __initdata, but that just causes the same
bug in SLES9 to re-appear, since it will then find other occurrences of
"Linux version " first.

Cc: Andy Whitcroft <apw@shadowen.org>
Acked-by: Herbert Poetzl <herbert@13thfloor.at>
Cc: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Steve Fox <drfickle@us.ibm.com>
Acked-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index dc3e580d1dca..92ea7743fe8f 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -47,6 +47,7 @@
 #include <linux/vmalloc.h>
 #include <linux/crash_dump.h>
 #include <linux/pid_namespace.h>
+#include <linux/compile.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include <asm/io.h>
@@ -253,8 +254,15 @@ static int version_read_proc(char *page, char **start, off_t off,
 {
 	int len;
 
-	len = sprintf(page, linux_banner,
-		utsname()->release, utsname()->version);
+	/* FIXED STRING! Don't touch! */
+	len = snprintf(page, PAGE_SIZE,
+		"%s version %s"
+		" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ")"
+		" (" LINUX_COMPILER ")"
+		" %s\n",
+		utsname()->sysname,
+		utsname()->release,
+		utsname()->version);
 	return proc_calc_metrics(page, start, off, count, eof, len);
 }
 
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index e8bfac34d2ba..b0c4a05a4b0c 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -17,8 +17,6 @@
 #include <asm/byteorder.h>
 #include <asm/bug.h>
 
-extern const char linux_banner[];
-
 #define INT_MAX		((int)(~0U>>1))
 #define INT_MIN		(-INT_MAX - 1)
 #define UINT_MAX	(~0U)
diff --git a/init/main.c b/init/main.c
index 036f97c0c34c..fcd9ddc3ccf5 100644
--- a/init/main.c
+++ b/init/main.c
@@ -483,6 +483,12 @@ void __init __attribute__((weak)) smp_setup_processor_id(void)
 {
 }
 
+static const char linux_banner[] =
+	"Linux version " UTS_RELEASE
+	" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ")"
+	" (" LINUX_COMPILER ")"
+	" " UTS_VERSION "\n";
+
 asmlinkage void __init start_kernel(void)
 {
 	char * command_line;
@@ -509,7 +515,7 @@ asmlinkage void __init start_kernel(void)
 	boot_cpu_init();
 	page_address_init();
 	printk(KERN_NOTICE);
-	printk(linux_banner, UTS_RELEASE, UTS_VERSION);
+	printk(linux_banner);
 	setup_arch(&command_line);
 	unwind_setup();
 	setup_per_cpu_areas();
diff --git a/init/version.c b/init/version.c
index 2a5dfcd1c2e6..9d96d36501ca 100644
--- a/init/version.c
+++ b/init/version.c
@@ -33,8 +33,3 @@ struct uts_namespace init_uts_ns = {
 	},
 };
 EXPORT_SYMBOL_GPL(init_uts_ns);
-
-const char linux_banner[] =
-	"Linux version %s (" LINUX_COMPILE_BY "@"
-	LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") %s\n";
-