Commit 0667b209 authored by Uladzislau Rezki (Sony)'s avatar Uladzislau Rezki (Sony) Committed by Andrew Morton
Browse files

mm/vmalloc: update __vmalloc_node_range() documentation 

__vmalloc() now supports non-blocking flags such as GFP_ATOMIC and
GFP_NOWAIT.  Update the documentation accordingly.

Link: https://lkml.kernel.org/r/20251007122035.56347-10-urezki@gmail.com


Signed-off-by: default avatarUladzislau Rezki (Sony) <urezki@gmail.com>
Acked-by: default avatarMichal Hocko <mhocko@suse.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Marco Elver <elver@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 7241bb2e

mm/vmalloc.c

+11 −10
Original line number Diff line number Diff line
@@ -3881,19 +3881,20 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask, 
 * @caller:		  caller's return address

 *

 * Allocate enough pages to cover @size from the page level

 * allocator with @gfp_mask flags. Please note that the full set of gfp

 * flags are not supported. GFP_KERNEL, GFP_NOFS and GFP_NOIO are all

 * supported.

 * Zone modifiers are not supported. From the reclaim modifiers

 * __GFP_DIRECT_RECLAIM is required (aka GFP_NOWAIT is not supported)

 * and only __GFP_NOFAIL is supported (i.e. __GFP_NORETRY and

 * __GFP_RETRY_MAYFAIL are not supported).

 * allocator with @gfp_mask flags and map them into contiguous

 * virtual range with protection @prot.

 *

 * __GFP_NOWARN can be used to suppress failures messages.

 * Supported GFP classes: %GFP_KERNEL, %GFP_ATOMIC, %GFP_NOWAIT,

 * %GFP_NOFS and %GFP_NOIO. Zone modifiers are not supported.

 * Please note %GFP_ATOMIC and %GFP_NOWAIT are supported only

 * by __vmalloc().

 *

 * Map them into contiguous kernel virtual space, using a pagetable

 * protection of @prot.

 * Retry modifiers: only %__GFP_NOFAIL is supported; %__GFP_NORETRY

 * and %__GFP_RETRY_MAYFAIL are not supported.

 *

 * %__GFP_NOWARN can be used to suppress failure messages.

 *

 * Can not be called from interrupt nor NMI contexts.

 * Return: the address of the area or %NULL on failure

 */

void *__vmalloc_node_range_noprof(unsigned long size, unsigned long align,