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percpu: use negative for auto for pcpu_setup_first_chunk() arguments

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Impact: argument semantic cleanup

In pcpu_setup_first_chunk(), zero @unit_size and @dyn_size meant
auto-sizing.  It's okay for @unit_size as 0 doesn't make sense but 0
dynamic reserve size is valid.  Alos, if arch @dyn_size is calculated
from other parameters, it might end up passing in 0 @dyn_size and
malfunction when the size is automatically adjusted.

This patch makes both @unit_size and @dyn_size ssize_t and use -1 for
auto sizing.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo
2009-03-06 14:33:59 +09:00
parent 61ace7fa2f
commit cafe8816b2
3 changed files with 29 additions and 24 deletions
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5
include/linux/percpu.h
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@@ -117,8 +117,9 @@ typedef struct page * (*pcpu_get_page_fn_t)(unsigned int cpu, int pageno);
typedef void (*pcpu_populate_pte_fn_t)(unsigned long addr);
extern size_t __init pcpu_setup_first_chunk(pcpu_get_page_fn_t get_page_fn,
size_t static_size, size_t unit_size,
size_t dyn_size, void *base_addr,
size_t static_size,
ssize_t unit_size, ssize_t dyn_size,
void *base_addr,
pcpu_populate_pte_fn_t populate_pte_fn);
/*