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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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5224f79096
There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use “flexible array members”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].
This code was transformed with the help of Coccinelle:
(next-20220214$ spatch --jobs $(getconf _NPROCESSORS_ONLN) --sp-file script.cocci --include-headers --dir . > output.patch)
@@
identifier S, member, array;
type T1, T2;
@@
struct S {
...
T1 member;
T2 array[
- 0
];
};
UAPI and wireless changes were intentionally excluded from this patch
and will be sent out separately.
[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
Link: https://github.com/KSPP/linux/issues/78
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Greybus Host Device
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*
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* Copyright 2014-2015 Google Inc.
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* Copyright 2014-2015 Linaro Ltd.
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*/
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#ifndef __HD_H
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#define __HD_H
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#include <linux/types.h>
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#include <linux/device.h>
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struct gb_host_device;
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struct gb_message;
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struct gb_hd_driver {
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size_t hd_priv_size;
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int (*cport_allocate)(struct gb_host_device *hd, int cport_id,
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unsigned long flags);
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void (*cport_release)(struct gb_host_device *hd, u16 cport_id);
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int (*cport_enable)(struct gb_host_device *hd, u16 cport_id,
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unsigned long flags);
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int (*cport_disable)(struct gb_host_device *hd, u16 cport_id);
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int (*cport_connected)(struct gb_host_device *hd, u16 cport_id);
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int (*cport_flush)(struct gb_host_device *hd, u16 cport_id);
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int (*cport_shutdown)(struct gb_host_device *hd, u16 cport_id,
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u8 phase, unsigned int timeout);
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int (*cport_quiesce)(struct gb_host_device *hd, u16 cport_id,
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size_t peer_space, unsigned int timeout);
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int (*cport_clear)(struct gb_host_device *hd, u16 cport_id);
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int (*message_send)(struct gb_host_device *hd, u16 dest_cport_id,
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struct gb_message *message, gfp_t gfp_mask);
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void (*message_cancel)(struct gb_message *message);
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int (*latency_tag_enable)(struct gb_host_device *hd, u16 cport_id);
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int (*latency_tag_disable)(struct gb_host_device *hd, u16 cport_id);
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int (*output)(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
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bool async);
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};
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struct gb_host_device {
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struct device dev;
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int bus_id;
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const struct gb_hd_driver *driver;
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struct list_head modules;
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struct list_head connections;
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struct ida cport_id_map;
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/* Number of CPorts supported by the UniPro IP */
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size_t num_cports;
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/* Host device buffer constraints */
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size_t buffer_size_max;
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struct gb_svc *svc;
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/* Private data for the host driver */
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unsigned long hd_priv[] __aligned(sizeof(s64));
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};
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#define to_gb_host_device(d) container_of(d, struct gb_host_device, dev)
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int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id);
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void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id);
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int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id,
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unsigned long flags);
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void gb_hd_cport_release(struct gb_host_device *hd, u16 cport_id);
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struct gb_host_device *gb_hd_create(struct gb_hd_driver *driver,
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struct device *parent,
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size_t buffer_size_max,
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size_t num_cports);
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int gb_hd_add(struct gb_host_device *hd);
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void gb_hd_del(struct gb_host_device *hd);
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void gb_hd_shutdown(struct gb_host_device *hd);
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void gb_hd_put(struct gb_host_device *hd);
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int gb_hd_output(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
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bool in_irq);
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int gb_hd_init(void);
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void gb_hd_exit(void);
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#endif /* __HD_H */
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