On Thu, 16 Jul 2015 15:26:00 +1000 Stephen Rothwell <s...@canb.auug.org.au>
wrote:
> Hi Andrew,
>
> After merging the akpm-current tree, today's linux-next build (arm
> multi_v7_defconfig) produced this warning:
>
> lib/genalloc.c: In function 'gen_pool_get':
> /scratch/sfr/next/lib/genalloc.c:599:6: warning: passing argument 4 of
> 'devres_find' discards 'const' qualifier from pointer target type
> p = devres_find(dev, devm_gen_pool_release, devm_gen_pool_match, name);
> ^
> In file included from /scratch/sfr/next/include/linux/node.h:17:0,
> from /scratch/sfr/next/include/linux/cpu.h:16,
> from /scratch/sfr/next/include/linux/of_device.h:4,
> from /scratch/sfr/next/lib/genalloc.c:37:
> /scratch/sfr/next/include/linux/device.h:620:14: note: expected 'void *' but
> argument is of type 'const char *'
> extern void *devres_find(struct device *dev, dr_release_t release,
> ^
>
> Caused by commit
>
> e89a70fd54f2 ("genalloc: add support of multiple gen_pools per device")
urgh. devres_find()'s `void *match' argument should always have been const.
I started to fix that but the fix spreads like a virus - by the time I had a
700 line diff I gave up.
So I guess we cast away the constness at the caller, like all the other
callers do :(
--- a/lib/genalloc.c~genalloc-add-support-of-multiple-gen_pools-per-device-fix
+++ a/lib/genalloc.c
@@ -596,7 +596,8 @@ struct gen_pool *gen_pool_get(struct dev
{
struct gen_pool **p;
- p = devres_find(dev, devm_gen_pool_release, devm_gen_pool_match, name);
+ p = devres_find(dev, devm_gen_pool_release, devm_gen_pool_match,
+ (void *)name);
if (!p)
return NULL;
return *p;
_
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