Re: [PATCH] bluetooth: hci_h5: avoid unused variable warnings
From: Hans de Goede <hidden>
Date: 2018-08-14 07:22:22
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Hi Arnd, On 14-08-18 00:04, Arnd Bergmann wrote:
When CONFIG_BT_HCIUART_RTL is disabled, the hci_h5 driver produces a build warning because of an incorrect set of #ifdef guards: drivers/bluetooth/hci_h5.c:920:22: error: 'rtl_vnd' defined but not used [-Werror=unused-variable] Replacing the #ifdef with an IS_ENABLED() check shuts up the error and simplifies the logic. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Hmm, so now you're counting on dead code elimination to remove references to unavailable symbols. I'm not sure I like this and since Marcel has also indicated the does not like this fix I believe we need another fix. I will write another fix for this. Regards, Hans
quoted hunk ↗ jump to hunk
--- drivers/bluetooth/hci_h5.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-)diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c index 8eede1197cd2..b10e64ba0ff4 100644 --- a/drivers/bluetooth/hci_h5.c +++ b/drivers/bluetooth/hci_h5.c@@ -841,7 +841,6 @@ static void h5_serdev_remove(struct serdev_device *serdev) hci_uart_unregister_device(&h5->serdev_hu); } -#ifdef CONFIG_BT_HCIUART_RTL static int h5_btrtl_setup(struct h5 *h5) { struct btrtl_device_info *btrtl_dev;@@ -923,24 +922,21 @@ static struct h5_vnd rtl_vnd = { .close = h5_btrtl_close, .acpi_gpio_map = acpi_btrtl_gpios, }; -#endif -#ifdef CONFIG_ACPI static const struct acpi_device_id h5_acpi_match[] = { -#ifdef CONFIG_BT_HCIUART_RTL { "OBDA8723", (kernel_ulong_t)&rtl_vnd }, -#endif { }, }; MODULE_DEVICE_TABLE(acpi, h5_acpi_match); -#endif static struct serdev_device_driver h5_serdev_driver = { .probe = h5_serdev_probe, .remove = h5_serdev_remove, .driver = { .name = "hci_uart_h5", - .acpi_match_table = ACPI_PTR(h5_acpi_match), + .acpi_match_table = (IS_ENABLED(CONFIG_BT_HCIUART_RTL) && + IS_ENABLED(CONFIG_ACPI)) ? + h5_acpi_match : 0, }, };