Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Tue, 27 Mar 2018 10:21:24 +0200 | Subject | Re: dma_zalloc_coherent broken with 57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7 |
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Hi Sebastian,
On Tue, Mar 27, 2018 at 10:12 AM, Sebastian Ott <sebott@linux.vnet.ibm.com> wrote: > commit 57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7 broke usage of dma > allocations specifying __GFP_ZERO by silently removing that flag.
How did it break? The flag is now always added.
> Why should "the memory returned [] always be zeroed."?
To avoid leaking information.
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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