• Paul Mundt's avatar
    x86/hw-breakpoints: Actually flush thread breakpoints in flush_thread(). · 41a48d14
    Paul Mundt authored
    flush_thread() tries to do a TIF_DEBUG check before calling in to
    flush_thread_hw_breakpoint() (which subsequently clears the thread flag),
    but for some reason, the x86 code is manually clearing TIF_DEBUG
    immediately before the test, so this path will never be taken.
    
    This kills off the erroneous clear_tsk_thread_flag() and lets
    flush_thread_hw_breakpoint() actually get invoked.
    
    Presumably folks were getting lucky with testing and the
    free_thread_info() -> free_thread_xstate() path was taking care of the
    flush there.
    Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
    Acked-by: default avatar"K.Prasad" <prasad@linux.vnet.ibm.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Alan Stern <stern@rowland.harvard.edu>
    LKML-Reference: <20091005102306.GA7889@linux-sh.org>
    Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
    41a48d14
process.c 13.7 KB