On 9/22/25 1:06 AM, Jürgen Groß wrote:
On 21.09.25 18:28, Marek Marczykowski-Górecki wrote:
Xen's do_suspend() calls dpm_suspend_start() without taking required
system_transition_mutex. Since 12ffc3b1513eb moved the
pm_restrict_gfp_mask() call, not taking that mutex results in a WARN.
Take the mutex in do_suspend(), and use mutex_trylock() to follow
how enter_state() does this.
Suggested-by: Jürgen Groß <[email protected]>
Fixes: 12ffc3b1513eb "PM: Restrict swap use to later in the suspend
sequence"
Link: https://lore.kernel.org/xen-devel/aKiBJeqsYx_4Top5@mail-itl/
Signed-off-by: Marek Marczykowski-Górecki
<[email protected]>
Cc: [email protected] # v6.16+
Reviewed-by: Juergen Gross <[email protected]>
Juergen
Reviewed-by: Mario Limonciello (AMD) <[email protected]>
