linux-kernel - [PATCH v2 0/2] Fix test_resume failure by openning swap device non-exclusively

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Message-Id: <cover.1681186310.git.yu.c.chen@intel.com>
Date:   Tue, 11 Apr 2023 20:18:43 +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>,
        Pavankumar Kondeti <quic_pkondeti@...cinc.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chen Yu <yu.c.chen@...el.com>
Subject: [PATCH v2 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 for patch 2 and it turns snapshot_test into a global variable.
Patch 2 opens swap device non-exclusively for test_resume mode, and exclusively for manual
hibernation resume.

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 | 12 +++++++++---
 kernel/power/power.h     |  1 +
 kernel/power/swap.c      |  5 +++--
 3 files changed, 13 insertions(+), 5 deletions(-)

-- 
2.25.1