git/linux-net
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/ synced 2026-05-02 18:15:03 -04:00
Code Issues Packages Projects Releases Wiki Activity

driver core: have match() callback in struct bus_type take a const *

Browse Source 
In the match() callback, the struct device_driver * should not be
changed, so change the function callback to be a const *.  This is one
step of many towards making the driver core safe to have struct
device_driver in read-only memory.

Because the match() callback is in all busses, all busses are modified
to handle this properly.  This does entail switching some container_of()
calls to container_of_const() to properly handle the constant *.

For some busses, like PCI and USB and HV, the const * is cast away in
the match callback as those busses do want to modify those structures at
this point in time (they have a local lock in the driver structure.)
That will have to be changed in the future if they wish to have their
struct device * in read-only-memory.

Cc: Rafael J. Wysocki <rafael@kernel.org>
Reviewed-by: Alex Elder <elder@kernel.org>
Acked-by: Sumit Garg <sumit.garg@linaro.org>
Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman
2024-07-01 14:07:37 +02:00
parent 6b521fc111
commit d69d804845
163 changed files with 268 additions and 338 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/maple.h
View File

@@ -97,7 +97,7 @@ int maple_add_packet(struct maple_device *mdev, u32 function,
void maple_clear_dev(struct maple_device *mdev);
#define to_maple_dev(n) container_of(n, struct maple_device, dev)
#define to_maple_driver(n) container_of(n, struct maple_driver, drv)
#define to_maple_driver(n) container_of_const(n, struct maple_driver, drv)
#define maple_get_drvdata(d) dev_get_drvdata(&(d)->dev)
#define maple_set_drvdata(d,p) dev_set_drvdata(&(d)->dev, (p))