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authorVineet Gupta <vgupta@synopsys.com>2021-01-06 12:34:36 -0800
committerVineet Gupta <vgupta@synopsys.com>2021-01-07 14:04:42 -0800
commitbb12433bf56e76789c6b08b36c546f745a6aa6e1 (patch)
tree9e97d5c41938b1cd3ab6a78ab2c34f70a410b3de
parentf4d9359de8ac0fb64a5ecc9c34833705eb53327b (diff)
downloadlinux-stericsson-bb12433bf56e76789c6b08b36c546f745a6aa6e1.tar.gz
ARC: unbork 5.11 bootup: fix snafu in _TIF_NOTIFY_SIGNAL handling
Linux 5.11.rcX was failing to boot on ARC HSDK board. Turns out we have a couple of issues, this being the first one, and I'm to blame as I didn't pay attention during review. TIF_NOTIFY_SIGNAL support requires checking multiple TIF_* bits in kernel return code path. Old code only needed to check a single bit so BBIT0 <TIF_SIGPENDING> worked. New code needs to check multiple bits so AND <bit-mask> instruction. So needs to use bit mask variant _TIF_SIGPENDING Cc: Jens Axboe <axboe@kernel.dk> Fixes: 53855e12588743ea128 ("arc: add support for TIF_NOTIFY_SIGNAL") Link: https://github.com/foss-for-synopsys-dwc-arc-processors/linux/issues/34 Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
-rw-r--r--arch/arc/kernel/entry.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index 1f5308abf36d..1743506081da 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -307,7 +307,7 @@ resume_user_mode_begin:
mov r0, sp ; pt_regs for arg to do_signal()/do_notify_resume()
GET_CURR_THR_INFO_FLAGS r9
- and.f 0, r9, TIF_SIGPENDING|TIF_NOTIFY_SIGNAL
+ and.f 0, r9, _TIF_SIGPENDING|_TIF_NOTIFY_SIGNAL
bz .Lchk_notify_resume
; Normal Trap/IRQ entry only saves Scratch (caller-saved) regs