kernel/linux.git/drivers/gpio/gpio-sim.c, branch v7.0.10

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-22T04:03:00+00:00

This converts some of the visually simpler cases that have been split over multiple lines. I only did the ones that are easy to verify the resulting diff by having just that final GFP_KERNEL argument on the next line. Somebody should probably do a proper coccinelle script for this, but for me the trivial script actually resulted in an assertion failure in the middle of the script. I probably had made it a bit _too_ trivial. So after fighting that far a while I decided to just do some of the syntactically simpler cases with variations of the previous 'sed' scripts. The more syntactically complex multi-line cases would mostly really want whitespace cleanup anyway. Signed-off-by: Linus Torvalds

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

gpio: Constify struct configfs_item_operations and configfs_group_operations

2025-12-17T09:27:08+00:00

'struct configfs_item_operations' and 'configfs_group_operations' are not modified in these drivers. Constifying these structures moves some data to a read-only section, so increases overall security, especially when the structure holds some function pointers. On a x86_64, with allmodconfig, as an example: Before: ====== text data bss dec hex filename 43935 11632 384 55951 da8f drivers/gpio/gpio-aggregator.o After: ===== text data bss dec hex filename 44191 11376 384 55951 da8f drivers/gpio/gpio-aggregator.o Signed-off-by: Christophe JAILLET Link: https://lore.kernel.org/r/ccb5155342ce6dbb89cfbad0687b448860d8e8f0.1765703044.git.christophe.jaillet@wanadoo.fr Signed-off-by: Bartosz Golaszewski

gpio: sim: don't use GPIO base in debugfs output

2025-08-25T18:55:45+00:00

We're in the process of removing unneeded references to the global GPIO base number treewide. Use the HW offset instead of the base number. Reviewed-by: Linus Walleij Link: https://lore.kernel.org/r/20250815111733.79283-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski

treewide: rename GPIO set callbacks back to their original names

2025-08-07T08:07:06+00:00

The conversion of all GPIO drivers to using the .set_rv() and .set_multiple_rv() callbacks from struct gpio_chip (which - unlike their predecessors - return an integer and allow the controller drivers to indicate failures to users) is now complete and the legacy ones have been removed. Rename the new callbacks back to their original names in one sweeping change. Signed-off-by: Bartosz Golaszewski

gpio: sim: allow to mark simulated lines as invalid

2025-07-09T14:48:49+00:00

Add a new line-level, boolean property to the gpio-sim configfs interface called 'valid'. It's set by default and the user can unset it to make the line be included in the standard `gpio-reserved-ranges` property when the chip is registered with GPIO core. This allows users to specify which lines should not be available for requesting as GPIOs. Link: https://lore.kernel.org/r/20250630130358.40352-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski

gpio: sim: use value returning setters

2025-02-26T10:17:39+00:00

struct gpio_chip now has additional variants of the set(_multiple) driver callbacks that return an integer to indicate success or failure. Convert the driver to using them. Reviewed-by: Linus Walleij Acked-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20250220-gpio-set-retval-v2-6-bc4cfd38dae3@linaro.org Signed-off-by: Bartosz Golaszewski

gpio: sim: convert to use dev-sync-probe utilities

2025-02-24T13:57:40+00:00

Update gpio-sim to use the new dev-sync-probe helper functions for synchronized platform device creation, reducing code duplication. No functional change. Signed-off-by: Koichiro Den Link: https://lore.kernel.org/r/20250221133501.2203897-3-koichiro.den@canonical.com Signed-off-by: Bartosz Golaszewski

gpio: sim: lock hog configfs items if present

2025-02-05T13:37:01+00:00

Depending on the user config, the leaf entry may be the hog directory, not line. Check it and lock the correct item. Fixes: 8bd76b3d3f3a ("gpio: sim: lock up configfs that an instantiated device depends on") Tested-by: Koichiro Den Link: https://lore.kernel.org/r/20250203110123.87701-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski