lkml.org 
[lkml]   [2012]   [Aug]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRE: efi_pstore: question about how to remove create_sysfs_entry() from a write callback.
    Date
    > Can we not serialize this with &efivars->lock if it is updated to disable interrupts?  A loop in the workqueue that locks, iterates through
    > ->get_next_variable, and compares against searches in
    > efivars->list should work, no?

    If my understanding is correct, your pseudo code is as follows.

    spin_lock_irqsave(&efivars_lock);

    do {
    get_next_variable();
    if (found new entry)
    efivars_create_sysfs_entries();

    } while()

    spin_lock_irqrestore(&efivars_lock);

    But, memory is allocated dynamically with kzalloc() in efivars_create_sysfs_entries().
    I don't want to allocate memory while holding spin_lock.

    Please let me know if I'm missing something.

    Seiji


    \
     
     \ /
      Last update: 2012-08-14 21:42    [W:4.747 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site