linux-kernel - [PATCH v3 0/2] Fix test_resume failure by openning swap device non-exclusively

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Date:   Fri, 14 Apr 2023 20:10:11 +0800
From:   Chen Yu <yu.c.chen@...el.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <len.brown@...el.com>
Cc:     Ye Bin <yebin10@...wei.com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Pavankumar Kondeti <quic_pkondeti@...cinc.com>,
        Yifan Li <yifan2.li@...el.com>, Chen Yu <yu.c.chen@...el.com>
Subject: [PATCH v3 0/2] Fix test_resume failure by openning swap device non-exclusively

test_resume does not work in current kernel when using swapfile for hibernation.
This is because the swap device should be openned non-exclusively in test_resume mode.

Patch 1 is a preparation to turn snapshot_test into a global variable.
Patch 2 is the fix to open swap device non-exclusively only for test_resume mode.

Change since v2:
Adjust the initialization of fmode and refine the commit message
per Rafael's suggestion.

Change since v1:
Turn snapshot_test into global variable and do not introduce parameters for swsusp_check()
nor load_image_and_restore().

Chen Yu (2):
  PM: hibernate: Turn snapshot_test into global variable
  PM: hibernate: Do not get block device exclusively in test_resume mode

 kernel/power/hibernate.c | 15 ++++++++++++---
 kernel/power/power.h     |  1 +
 kernel/power/swap.c      |  8 ++++++--
 3 files changed, 19 insertions(+), 5 deletions(-)

-- 
2.25.1