From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- lib/test_static_keys.c | 240 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 240 insertions(+) create mode 100644 lib/test_static_keys.c (limited to 'lib/test_static_keys.c') diff --git a/lib/test_static_keys.c b/lib/test_static_keys.c new file mode 100644 index 000000000..00c715f30 --- /dev/null +++ b/lib/test_static_keys.c @@ -0,0 +1,240 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Kernel module for testing static keys. + * + * Copyright 2015 Akamai Technologies Inc. All Rights Reserved + * + * Authors: + * Jason Baron + */ + +#include +#include + +/* old keys */ +struct static_key old_true_key = STATIC_KEY_INIT_TRUE; +struct static_key old_false_key = STATIC_KEY_INIT_FALSE; + +/* new api */ +DEFINE_STATIC_KEY_TRUE(true_key); +DEFINE_STATIC_KEY_FALSE(false_key); + +/* external */ +extern struct static_key base_old_true_key; +extern struct static_key base_inv_old_true_key; +extern struct static_key base_old_false_key; +extern struct static_key base_inv_old_false_key; + +/* new api */ +extern struct static_key_true base_true_key; +extern struct static_key_true base_inv_true_key; +extern struct static_key_false base_false_key; +extern struct static_key_false base_inv_false_key; + + +struct test_key { + bool init_state; + struct static_key *key; + bool (*test_key)(void); +}; + +#define test_key_func(key, branch) \ +static bool key ## _ ## branch(void) \ +{ \ + return branch(&key); \ +} + +static void invert_key(struct static_key *key) +{ + if (static_key_enabled(key)) + static_key_disable(key); + else + static_key_enable(key); +} + +static void invert_keys(struct test_key *keys, int size) +{ + struct static_key *previous = NULL; + int i; + + for (i = 0; i < size; i++) { + if (previous != keys[i].key) { + invert_key(keys[i].key); + previous = keys[i].key; + } + } +} + +static int verify_keys(struct test_key *keys, int size, bool invert) +{ + int i; + bool ret, init; + + for (i = 0; i < size; i++) { + ret = static_key_enabled(keys[i].key); + init = keys[i].init_state; + if (ret != (invert ? !init : init)) + return -EINVAL; + ret = keys[i].test_key(); + if (static_key_enabled(keys[i].key)) { + if (!ret) + return -EINVAL; + } else { + if (ret) + return -EINVAL; + } + } + return 0; +} + +test_key_func(old_true_key, static_key_true) +test_key_func(old_false_key, static_key_false) +test_key_func(true_key, static_branch_likely) +test_key_func(true_key, static_branch_unlikely) +test_key_func(false_key, static_branch_likely) +test_key_func(false_key, static_branch_unlikely) +test_key_func(base_old_true_key, static_key_true) +test_key_func(base_inv_old_true_key, static_key_true) +test_key_func(base_old_false_key, static_key_false) +test_key_func(base_inv_old_false_key, static_key_false) +test_key_func(base_true_key, static_branch_likely) +test_key_func(base_true_key, static_branch_unlikely) +test_key_func(base_inv_true_key, static_branch_likely) +test_key_func(base_inv_true_key, static_branch_unlikely) +test_key_func(base_false_key, static_branch_likely) +test_key_func(base_false_key, static_branch_unlikely) +test_key_func(base_inv_false_key, static_branch_likely) +test_key_func(base_inv_false_key, static_branch_unlikely) + +static int __init test_static_key_init(void) +{ + int ret; + int size; + + struct test_key static_key_tests[] = { + /* internal keys - old keys */ + { + .init_state = true, + .key = &old_true_key, + .test_key = &old_true_key_static_key_true, + }, + { + .init_state = false, + .key = &old_false_key, + .test_key = &old_false_key_static_key_false, + }, + /* internal keys - new keys */ + { + .init_state = true, + .key = &true_key.key, + .test_key = &true_key_static_branch_likely, + }, + { + .init_state = true, + .key = &true_key.key, + .test_key = &true_key_static_branch_unlikely, + }, + { + .init_state = false, + .key = &false_key.key, + .test_key = &false_key_static_branch_likely, + }, + { + .init_state = false, + .key = &false_key.key, + .test_key = &false_key_static_branch_unlikely, + }, + /* external keys - old keys */ + { + .init_state = true, + .key = &base_old_true_key, + .test_key = &base_old_true_key_static_key_true, + }, + { + .init_state = false, + .key = &base_inv_old_true_key, + .test_key = &base_inv_old_true_key_static_key_true, + }, + { + .init_state = false, + .key = &base_old_false_key, + .test_key = &base_old_false_key_static_key_false, + }, + { + .init_state = true, + .key = &base_inv_old_false_key, + .test_key = &base_inv_old_false_key_static_key_false, + }, + /* external keys - new keys */ + { + .init_state = true, + .key = &base_true_key.key, + .test_key = &base_true_key_static_branch_likely, + }, + { + .init_state = true, + .key = &base_true_key.key, + .test_key = &base_true_key_static_branch_unlikely, + }, + { + .init_state = false, + .key = &base_inv_true_key.key, + .test_key = &base_inv_true_key_static_branch_likely, + }, + { + .init_state = false, + .key = &base_inv_true_key.key, + .test_key = &base_inv_true_key_static_branch_unlikely, + }, + { + .init_state = false, + .key = &base_false_key.key, + .test_key = &base_false_key_static_branch_likely, + }, + { + .init_state = false, + .key = &base_false_key.key, + .test_key = &base_false_key_static_branch_unlikely, + }, + { + .init_state = true, + .key = &base_inv_false_key.key, + .test_key = &base_inv_false_key_static_branch_likely, + }, + { + .init_state = true, + .key = &base_inv_false_key.key, + .test_key = &base_inv_false_key_static_branch_unlikely, + }, + }; + + size = ARRAY_SIZE(static_key_tests); + + ret = verify_keys(static_key_tests, size, false); + if (ret) + goto out; + + invert_keys(static_key_tests, size); + ret = verify_keys(static_key_tests, size, true); + if (ret) + goto out; + + invert_keys(static_key_tests, size); + ret = verify_keys(static_key_tests, size, false); + if (ret) + goto out; + return 0; +out: + return ret; +} + +static void __exit test_static_key_exit(void) +{ +} + +module_init(test_static_key_init); +module_exit(test_static_key_exit); + +MODULE_AUTHOR("Jason Baron "); +MODULE_DESCRIPTION("Kernel module for testing static keys"); +MODULE_LICENSE("GPL"); -- cgit v1.3.1