[PATCH v3] Only print debug message when failed to serach for kernel symbol from /proc/kallsyms

[Philip Prindeville]

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