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authorDave Young <dyoung@redhat.com>2015-09-09 15:38:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-10 13:29:01 -0700
commit2965faa5e03d1e71e9ff9aa143fff39e0a77543a (patch)
tree78b12008d7078a9cd40e157d5b18b795b14d5d9c /init
parenta43cac0d9dc2073ff2245a171429ddbe1accece7 (diff)
downloadlinux-linaro-stable-2965faa5e03d1e71e9ff9aa143fff39e0a77543a.tar.gz
kexec: split kexec_load syscall from kexec core code
There are two kexec load syscalls, kexec_load another and kexec_file_load. kexec_file_load has been splited as kernel/kexec_file.c. In this patch I split kexec_load syscall code to kernel/kexec.c. And add a new kconfig option KEXEC_CORE, so we can disable kexec_load and use kexec_file_load only, or vice verse. The original requirement is from Ted Ts'o, he want kexec kernel signature being checked with CONFIG_KEXEC_VERIFY_SIG enabled. But kexec-tools use kexec_load syscall can bypass the checking. Vivek Goyal proposed to create a common kconfig option so user can compile in only one syscall for loading kexec kernel. KEXEC/KEXEC_FILE selects KEXEC_CORE so that old config files still work. Because there's general code need CONFIG_KEXEC_CORE, so I updated all the architecture Kconfig with a new option KEXEC_CORE, and let KEXEC selects KEXEC_CORE in arch Kconfig. Also updated general kernel code with to kexec_load syscall. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Dave Young <dyoung@redhat.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Petr Tesarik <ptesarik@suse.cz> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Josh Boyer <jwboyer@fedoraproject.org> Cc: David Howells <dhowells@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
-rw-r--r--init/initramfs.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/init/initramfs.c b/init/initramfs.c
index ad1bd7787bbb..b32ad7d97ac9 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -526,14 +526,14 @@ extern unsigned long __initramfs_size;
static void __init free_initrd(void)
{
-#ifdef CONFIG_KEXEC
+#ifdef CONFIG_KEXEC_CORE
unsigned long crashk_start = (unsigned long)__va(crashk_res.start);
unsigned long crashk_end = (unsigned long)__va(crashk_res.end);
#endif
if (do_retain_initrd)
goto skip;
-#ifdef CONFIG_KEXEC
+#ifdef CONFIG_KEXEC_CORE
/*
* If the initrd region is overlapped with crashkernel reserved region,
* free only memory that is not part of crashkernel region.