On Sat, Sep 13, 2025 at 03:19:25PM +0800, GuangFei Luo wrote: > v4: > - Uses guard(mutex) for battery->sysfs_lock in sysfs_add_battery(). > - Since sysfs_add_battery() now handles the battery->bat check with > proper locking,the extra if (!battery->bat) check at the call site > has become redundant. > > v3: > - Modified the earlier approach: since sysfs_add_battery() is invoked > from multiple places, the most reliable way is to add the lock inside > the function itself. > - sysfs_remove_battery() had a similar race issue in the past, which was > fixed by adding a lock as well. Reference: > https://lore.kernel.org/all/9c921c22a7f33397a6774d7fa076db9b6a0fd669 > .1312318300.git.len.brown@xxxxxxxxx/ > > v2: > - Fix missing mutex_unlock in acpi_battery_update() > (Reported-by: kernel test robot) > > v1: > When removing and reinserting the laptop battery, ACPI can trigger > two notifications in quick succession: Again, all of this goes below the --- line, not above it.
