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Jean-Sébastien Pédron
14dcd40983
... instead of `M_WAITOK`. [Why] The reason is that in some places in the DRM drivers (in particular, the framebuffer management code), kmalloc() is called from a non-sleepable context, such as after a call to mtx_lock(8) with an MTX_DEF mutex. If `GFP_KERNEL` is defined as `M_WAITOK`, we hit an assertion from witness(4). [How] The definition of `GFP_KERNEL` is changed to `M_NOWAIT`. This means that callers should verify the return value of kmalloc(). Fortunately, this is always the case in Linux. Reviewed by: bz, emaste, manu Approved by: manu Differential Revision: https://reviews.freebsd.org/D42054