From f1e8bf56320a7fb32095b6c51b707459361b403b Mon Sep 17 00:00:00 2001 From: Zijun Hu Date: Tue, 24 Dec 2024 21:05:03 +0800 Subject: driver core: Constify API device_find_child() and adapt for various usages MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Constify the following API: struct device *device_find_child(struct device *dev, void *data, int (*match)(struct device *dev, void *data)); To : struct device *device_find_child(struct device *dev, const void *data, device_match_t match); typedef int (*device_match_t)(struct device *dev, const void *data); with the following reasons: - Protect caller's match data @*data which is for comparison and lookup and the API does not actually need to modify @*data. - Make the API's parameters (@match)() and @data have the same type as all of other device finding APIs (bus|class|driver)_find_device(). - All kinds of existing device match functions can be directly taken as the API's argument, they were exported by driver core. Constify the API and adapt for various existing usages. BTW, various subsystem changes are squashed into this commit to meet 'git bisect' requirement, and this commit has the minimal and simplest changes to complement squashing shortcoming, and that may bring extra code improvement. Reviewed-by: Alison Schofield Reviewed-by: Takashi Sakamoto Acked-by: Uwe Kleine-König # for drivers/pwm Signed-off-by: Zijun Hu Reviewed-by: Jonathan Cameron Reviewed-by: Mathieu Poirier Link: https://lore.kernel.org/r/20241224-const_dfc_done-v5-4-6623037414d4@quicinc.com Signed-off-by: Greg Kroah-Hartman --- drivers/firmware/efi/dev-path-parser.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/firmware/efi/dev-path-parser.c') diff --git a/drivers/firmware/efi/dev-path-parser.c b/drivers/firmware/efi/dev-path-parser.c index 937be269fee8..13ea141c0def 100644 --- a/drivers/firmware/efi/dev-path-parser.c +++ b/drivers/firmware/efi/dev-path-parser.c @@ -47,9 +47,9 @@ static long __init parse_acpi_path(const struct efi_dev_path *node, return 0; } -static int __init match_pci_dev(struct device *dev, void *data) +static int __init match_pci_dev(struct device *dev, const void *data) { - unsigned int devfn = *(unsigned int *)data; + unsigned int devfn = *(const unsigned int *)data; return dev_is_pci(dev) && to_pci_dev(dev)->devfn == devfn; } -- cgit v1.2.3