[PATCH] [2/2] modinfo: Add -k option to use a different kernel version

[Jeff Pohlmeyer]

(These two patches are somewhat related but do not depend on each other and
can be applied separately.)

Support -k to use another kernel version (30 bytes)

Normally modinfo will use version information from the currently running
kernel (similar to `uname -r`). This patch adds a compile-time configuration
option to enable the -k switch, which allows specifying a different kernel
version. This can be useful with the -F {depends,softdep} options to determine
module dependencies when building a new initramfs aftera kernel upgrade.


function                                             old     new   delta
modinfo_main                                         380     430     +50
.rodata                                           103911  103913      +2
packed_usage                                       34776   34754     -22
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 52/-22)             Total: 30 bytes
   text       data        bss        dec        hex    filename
1180482       7435       4984    1192901     1233c5    busybox_old
1180512       7435       4984    1192931     1233e3    busybox_unstripped
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