diff options
| -rw-r--r-- | fs/proc/Makefile | 1 | ||||
| -rw-r--r-- | fs/proc/version_signature.c | 31 | ||||
| -rw-r--r-- | init/Kconfig | 9 | ||||
| -rw-r--r-- | init/version.c | 6 |
4 files changed, 46 insertions, 1 deletions
diff --git a/fs/proc/Makefile b/fs/proc/Makefile index c1c72933592..cc68b63d572 100644 --- a/fs/proc/Makefile +++ b/fs/proc/Makefile @@ -28,3 +28,4 @@ proc-$(CONFIG_PROC_VMCORE) += vmcore.o proc-$(CONFIG_PROC_DEVICETREE) += proc_devtree.o proc-$(CONFIG_PRINTK) += kmsg.o proc-$(CONFIG_PROC_PAGE_MONITOR) += page.o +proc-y += version_signature.o diff --git a/fs/proc/version_signature.c b/fs/proc/version_signature.c new file mode 100644 index 00000000000..859fb6092a6 --- /dev/null +++ b/fs/proc/version_signature.c @@ -0,0 +1,31 @@ +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/utsname.h> + +static int version_signature_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "%s\n", CONFIG_VERSION_SIGNATURE); + return 0; +} + +static int version_signature_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, version_signature_proc_show, NULL); +} + +static const struct file_operations version_signature_proc_fops = { + .open = version_signature_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init proc_version_signature_init(void) +{ + proc_create("version_signature", 0, NULL, &version_signature_proc_fops); + return 0; +} +module_init(proc_version_signature_init); diff --git a/init/Kconfig b/init/Kconfig index 6cfd71d0646..b32ca50d4e7 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -212,6 +212,15 @@ config DEFAULT_HOSTNAME but you may wish to use a different default here to make a minimal system more usable with less configuration. +config VERSION_SIGNATURE + string "Arbitrary version signature" + help + This string will be created in a file, /proc/version_signature. It + is useful in determining arbitrary data about your kernel. For instance, + if you have several kernels of the same version, but need to keep track + of a revision of the same kernel, but not affect it's ability to load + compatible modules, this is the easiest way to do that. + config SWAP bool "Support for paging of anonymous memory (swap)" depends on MMU && BLOCK diff --git a/init/version.c b/init/version.c index 86fe0ccb997..3a9433a39d2 100644 --- a/init/version.c +++ b/init/version.c @@ -40,7 +40,11 @@ EXPORT_SYMBOL_GPL(init_uts_ns); /* FIXED STRINGS! Don't touch! */ const char linux_banner[] = "Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@" - LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION "\n"; + LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION +#ifdef CONFIG_VERSION_SIGNATURE + " (" CONFIG_VERSION_SIGNATURE ")" +#endif + "\n"; const char linux_proc_banner[] = "%s version %s" |