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Groups > linux.kernel > #1739082
| From | Oleg Nesterov <oleg@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/4] idr: Add a function idr_get() |
| Date | 2017-09-25 16:20 +0200 |
| Message-ID | <utCoN-7tX-15@gated-at.bofh.it> (permalink) |
| References | <utB9n-6tv-9@gated-at.bofh.it> <utB9o-6tv-19@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 09/25, Gargi Sharma wrote:
>
> idr_get(namespace, id) returns a NULL if id is not present
> in the idr tree or returns the pointer to the struct if id is
> present in the idr tree. With this function in the idr library,
> code for pid allocation can be simplified by calling this function
> instead of looking through the pidhash.
Could you explain why find_pid_ns() can't use idr_find() ?
> +void * idr_get(struct idr *idr, int *id)
> +{
> + struct radix_tree_node *node;
> + void __rcu **slot = NULL;
> +
> + __radix_tree_lookup(&idr->idr_rt, *id, &node, &slot);
so why it takes "int *", not just "int" ?
Oleg.
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[PATCH 2/4] idr: Add a function idr_get() Gargi Sharma <gs051095@gmail.com> - 2017-09-25 15:00 +0200
Re: [PATCH 2/4] idr: Add a function idr_get() Rik van Riel <riel@surriel.com> - 2017-09-25 15:30 +0200
Re: [PATCH 2/4] idr: Add a function idr_get() Christoph Hellwig <hch@infradead.org> - 2017-09-25 15:50 +0200
Re: [PATCH 2/4] idr: Add a function idr_get() Oleg Nesterov <oleg@redhat.com> - 2017-09-25 16:20 +0200
Re: [PATCH 2/4] idr: Add a function idr_get() Gargi Sharma <gs051095@gmail.com> - 2017-09-25 19:50 +0200
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