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 dc3e580..92ea774 100644 (file)
--- 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 e8bfac3..b0c4a05 100644 (file)
--- 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 036f97c..fcd9ddc 100644 (file)
--- 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 2a5dfcd..9d96d36 100644 (file)
--- 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";
-