• Dave P Martin's avatar
    arm64/BUG: Show explicit backtrace for WARNs · a4653228
    Dave P Martin authored
    
    
    The generic slowpath WARN implementation prints a backtrace, but
    the report_bug() based implementation does not, opting to print the
    registers instead which is generally not as useful.
    
    Ideally, report_bug() should be fixed to make the behaviour more
    consistent, but in the meantime this patch generates a backtrace
    directly from the arm64 backend instead so that this functionality
    is not lost with the migration to report_bug().
    
    As a side-effect, the backtrace will be outside the oops end
    marker, but that's hard to avoid without modifying generic code.
    
    This patch can go away if report_bug() grows the ability in the
    future to generate a backtrace directly or call an arch hook at the
    appropriate time.
    Signed-off-by: default avatarDave Martin <Dave.Martin@arm.com>
    Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
    Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
    a4653228
traps.c 13.1 KB