[PATCH v3] Only print debug message when failed to serach for kernel symbol from /proc/kallsyms
Philip Prindeville
philipp_subx at redfish-solutions.com
Wed Mar 8 20:13:35 PST 2017
Inline…
> On Mar 5, 2017, at 6:46 PM, Dave Young <dyoung at redhat.com> wrote:
>
> On 03/03/17 at 11:52am, Baoquan He wrote:
>> Kernel symbol page_offset_base could be unavailable when mm KASLR code is
>> not compiled in kernel. It's unappropriate to print out error message
I subscribed to the list the day after this patch went out… Anyway, change to “inappropriate”.
-Philip
>> when failed to search for page_offset_base from /proc/kallsyms. Seems now
>> there is not a way to find out if mm KASLR is compiled in or not. An
>> alternative approach is only printing out debug message in get_kernel_sym
>> if failed to search a expected kernel symbol.
>>
>> Do it in this patch, a simple fix.
>>
>> Signed-off-by: Baoquan He <bhe at redhat.com>
>> ---
>> kexec/arch/i386/crashdump-x86.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/kexec/arch/i386/crashdump-x86.c b/kexec/arch/i386/crashdump-x86.c
>> index 88aeee3..c4cf201 100644
>> --- a/kexec/arch/i386/crashdump-x86.c
>> +++ b/kexec/arch/i386/crashdump-x86.c
>> @@ -127,7 +127,7 @@ static unsigned long long get_kernel_sym(const char *symbol)
>> }
>> }
>>
>> - fprintf(stderr, "Cannot get kernel %s symbol address\n", symbol);
>> + dbgprintf("Cannot get kernel %s symbol address\n", symbol);
>> return 0;
>> }
>>
>> --
>> 2.5.5
>>
>
> It looks reasonable to me:
>
> Acked-by: Dave Young <dyoung at redhat.com>
>
> Thanks
> Dave
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