diff options
| author | Alexander Egorenkov <egorenar@linux.ibm.com> | 2021-03-25 12:10:56 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-07-05 12:44:23 +0200 |
| commit | 9f744abb4639e793689570fc9dcdf5f2f028bc9a (patch) | |
| tree | 17f1bea54f04855360596fbd8f19898781ed2e5d /arch/s390/kernel | |
| parent | 549abb7f36f2dbf91515bf5537a63ae47a275a35 (diff) | |
s390/boot: replace magic string check with a bootdata flag
The magic string "S390EP" at offset 0x10008 indicated to the decompressed
kernel that it was booted by the decompressor. Introduce a new bootdata
flag instead which conveys the same information in an explicit and
a cleaner way. But keep the magic string because it is a kernel ABI.
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/early.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index c2cf79d353cf..fb84e3fc1686 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -33,6 +33,8 @@ #include <asm/switch_to.h> #include "entry.h" +int __bootdata(is_full_image); + static void __init reset_tod_clock(void) { union tod_clock clk; @@ -279,7 +281,7 @@ static void __init setup_boot_command_line(void) static void __init check_image_bootable(void) { - if (!memcmp(EP_STRING, (void *)EP_OFFSET, strlen(EP_STRING))) + if (is_full_image) return; sclp_early_printk("Linux kernel boot failure: An attempt to boot a vmlinux ELF image failed.\n"); |