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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: Uladzislau Rezki (Sony) <urezki@gmail.com>
Acked-by: Michal 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: Andrew Morton <akpm@linux-foundation.org>
pull/1354/merge
Uladzislau Rezki (Sony) 2025-10-07 14:20:34 +02:00 committed by Andrew Morton
parent 7241bb2ea3
commit 0667b209e9
1 changed files with 11 additions and 10 deletions
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21
mm/vmalloc.c
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@ -3881,19 +3881,20 @@ fail:
* @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,