• Santosh Shilimkar's avatar
    ARM: 5763/1: ARM: SMP: Fix the BUG with CONFIG_PREEMPT enabled · daaeb6c9
    Santosh Shilimkar authored
    This patch fixes the BUG: using smp_processor_id() in preemptible
    Below is the stripped backtrace.
    
    BUG: using smp_processor_id() in preemptible [00000000] code: init/1
    caller is flush_tlb_mm+0x44/0x70
    Backtrace:
    [<c00225c4>] (dump_backtrace+0x0/0x110) from [<c01713a0>] (dump_stack+0x18/0x1c)
     r7:00000000 r6:c00234f0 r5:00000001 r4:c7828000
    [<c0171388>] (dump_stack+0x0/0x1c) from [<c0135364>] (debug_smp_processor_id+0xc0/0xf0)
    [<c01352a4>] (debug_smp_processor_id+0x0/0xf0) from [<c00234f0>] (flush_tlb_mm+0x44/0x70)
     r7:00000000 r6:c60b41a0 r5:c60b4154 r4:00000001
    [<c00234ac>] (flush_tlb_mm+0x0/0x70) from [<c0039568>] (dup_mm+0x304/0x38c)
     r5:c1f09058 r4:00000000
    [<c0039264>] (dup_mm+0x0/0x38c) from [<c0039de4>] (copy_process+0x7b8/0xeb0)
    [<c003962c>] (copy_process+0x0/0xeb0) from [<c003a638>] (do_fork+0x15c/0x29c)
    [<c003a4dc>] (do_fork+0x0/0x29c) from [<c0021df0>] (sys_clone+0x34/0x3c)
    [<c0021dbc>] (sys_clone+0x0/0x3c) from [<c001efa0>] (ret_fast_syscall+0x0/0x2c)
    Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
    Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
    daaeb6c9
tlbflush.h 14.5 KB