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flex_array: flex_array_prealloc takes a number of elements, not an end

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Change flex_array_prealloc to take the number of elements for which space
should be allocated instead of the last (inclusive) element. Users
and documentation are updated accordingly.  flex_arrays got introduced before
they had users.  When folks started using it, they ended up needing a
different API than was coded up originally.  This swaps over to the API that
folks apparently need.

Based-on-patch-by: Steffen Klassert <[email protected]>
Signed-off-by: Eric Paris <[email protected]>
Tested-by: Chris Richards <[email protected]>
Acked-by: Dave Hansen <[email protected]>
Cc: [email protected] [2.6.38+]
This commit is contained in:
Eric Paris 2011-04-28 15:55:52 -04:00
commit 5d30b10bd6
4 changed files with 14 additions and 11 deletions
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4
Documentation/flexible-arrays.txt
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@ -66,10 +66,10 @@ trick is to ensure that any needed memory allocations are done before
entering atomic context, using:
int flex_array_prealloc(struct flex_array *array, unsigned int start,
unsigned int end, gfp_t flags);
unsigned int nr_elements, gfp_t flags);
This function will ensure that memory for the elements indexed in the range
defined by start and end has been allocated. Thereafter, a
defined by start and nr_elements has been allocated. Thereafter, a
flex_array_put() call on an element in that range is guaranteed not to
block.