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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
commitf4cdf7ca9a1fdcca413157df19753f388a5a224e (patch)
tree60a31895b2446cd7fa27514e8c2843534a0de0da /lib/atomic64_test.c
downloadlinux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz
linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
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 ...
Diffstat (limited to 'lib/atomic64_test.c')
-rw-r--r--lib/atomic64_test.c277
1 files changed, 277 insertions, 0 deletions
diff --git a/lib/atomic64_test.c b/lib/atomic64_test.c
new file mode 100644
index 000000000..d72606835
--- /dev/null
+++ b/lib/atomic64_test.c
@@ -0,0 +1,277 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Testsuite for atomic64_t functions
+ *
+ * Copyright © 2010 Luca Barbieri
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/bug.h>
+#include <linux/kernel.h>
+#include <linux/atomic.h>
+#include <linux/module.h>
+
+#ifdef CONFIG_X86
+#include <asm/cpufeature.h> /* for boot_cpu_has below */
+#endif
+
+#define TEST(bit, op, c_op, val) \
+do { \
+ atomic##bit##_set(&v, v0); \
+ r = v0; \
+ atomic##bit##_##op(val, &v); \
+ r c_op val; \
+ WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n", \
+ (unsigned long long)atomic##bit##_read(&v), \
+ (unsigned long long)r); \
+} while (0)
+
+/*
+ * Test for a atomic operation family,
+ * @test should be a macro accepting parameters (bit, op, ...)
+ */
+
+#define FAMILY_TEST(test, bit, op, args...) \
+do { \
+ test(bit, op, ##args); \
+ test(bit, op##_acquire, ##args); \
+ test(bit, op##_release, ##args); \
+ test(bit, op##_relaxed, ##args); \
+} while (0)
+
+#define TEST_RETURN(bit, op, c_op, val) \
+do { \
+ atomic##bit##_set(&v, v0); \
+ r = v0; \
+ r c_op val; \
+ BUG_ON(atomic##bit##_##op(val, &v) != r); \
+ BUG_ON(atomic##bit##_read(&v) != r); \
+} while (0)
+
+#define TEST_FETCH(bit, op, c_op, val) \
+do { \
+ atomic##bit##_set(&v, v0); \
+ r = v0; \
+ r c_op val; \
+ BUG_ON(atomic##bit##_##op(val, &v) != v0); \
+ BUG_ON(atomic##bit##_read(&v) != r); \
+} while (0)
+
+#define RETURN_FAMILY_TEST(bit, op, c_op, val) \
+do { \
+ FAMILY_TEST(TEST_RETURN, bit, op, c_op, val); \
+} while (0)
+
+#define FETCH_FAMILY_TEST(bit, op, c_op, val) \
+do { \
+ FAMILY_TEST(TEST_FETCH, bit, op, c_op, val); \
+} while (0)
+
+#define TEST_ARGS(bit, op, init, ret, expect, args...) \
+do { \
+ atomic##bit##_set(&v, init); \
+ BUG_ON(atomic##bit##_##op(&v, ##args) != ret); \
+ BUG_ON(atomic##bit##_read(&v) != expect); \
+} while (0)
+
+#define XCHG_FAMILY_TEST(bit, init, new) \
+do { \
+ FAMILY_TEST(TEST_ARGS, bit, xchg, init, init, new, new); \
+} while (0)
+
+#define CMPXCHG_FAMILY_TEST(bit, init, new, wrong) \
+do { \
+ FAMILY_TEST(TEST_ARGS, bit, cmpxchg, \
+ init, init, new, init, new); \
+ FAMILY_TEST(TEST_ARGS, bit, cmpxchg, \
+ init, init, init, wrong, new); \
+} while (0)
+
+#define INC_RETURN_FAMILY_TEST(bit, i) \
+do { \
+ FAMILY_TEST(TEST_ARGS, bit, inc_return, \
+ i, (i) + one, (i) + one); \
+} while (0)
+
+#define DEC_RETURN_FAMILY_TEST(bit, i) \
+do { \
+ FAMILY_TEST(TEST_ARGS, bit, dec_return, \
+ i, (i) - one, (i) - one); \
+} while (0)
+
+static __init void test_atomic(void)
+{
+ int v0 = 0xaaa31337;
+ int v1 = 0xdeadbeef;
+ int onestwos = 0x11112222;
+ int one = 1;
+
+ atomic_t v;
+ int r;
+
+ TEST(, add, +=, onestwos);
+ TEST(, add, +=, -one);
+ TEST(, sub, -=, onestwos);
+ TEST(, sub, -=, -one);
+ TEST(, or, |=, v1);
+ TEST(, and, &=, v1);
+ TEST(, xor, ^=, v1);
+ TEST(, andnot, &= ~, v1);
+
+ RETURN_FAMILY_TEST(, add_return, +=, onestwos);
+ RETURN_FAMILY_TEST(, add_return, +=, -one);
+ RETURN_FAMILY_TEST(, sub_return, -=, onestwos);
+ RETURN_FAMILY_TEST(, sub_return, -=, -one);
+
+ FETCH_FAMILY_TEST(, fetch_add, +=, onestwos);
+ FETCH_FAMILY_TEST(, fetch_add, +=, -one);
+ FETCH_FAMILY_TEST(, fetch_sub, -=, onestwos);
+ FETCH_FAMILY_TEST(, fetch_sub, -=, -one);
+
+ FETCH_FAMILY_TEST(, fetch_or, |=, v1);
+ FETCH_FAMILY_TEST(, fetch_and, &=, v1);
+ FETCH_FAMILY_TEST(, fetch_andnot, &= ~, v1);
+ FETCH_FAMILY_TEST(, fetch_xor, ^=, v1);
+
+ INC_RETURN_FAMILY_TEST(, v0);
+ DEC_RETURN_FAMILY_TEST(, v0);
+
+ XCHG_FAMILY_TEST(, v0, v1);
+ CMPXCHG_FAMILY_TEST(, v0, v1, onestwos);
+
+}
+
+#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
+static __init void test_atomic64(void)
+{
+ long long v0 = 0xaaa31337c001d00dLL;
+ long long v1 = 0xdeadbeefdeafcafeLL;
+ long long v2 = 0xfaceabadf00df001LL;
+ long long v3 = 0x8000000000000000LL;
+ long long onestwos = 0x1111111122222222LL;
+ long long one = 1LL;
+ int r_int;
+
+ atomic64_t v = ATOMIC64_INIT(v0);
+ long long r = v0;
+ BUG_ON(v.counter != r);
+
+ atomic64_set(&v, v1);
+ r = v1;
+ BUG_ON(v.counter != r);
+ BUG_ON(atomic64_read(&v) != r);
+
+ TEST(64, add, +=, onestwos);
+ TEST(64, add, +=, -one);
+ TEST(64, sub, -=, onestwos);
+ TEST(64, sub, -=, -one);
+ TEST(64, or, |=, v1);
+ TEST(64, and, &=, v1);
+ TEST(64, xor, ^=, v1);
+ TEST(64, andnot, &= ~, v1);
+
+ RETURN_FAMILY_TEST(64, add_return, +=, onestwos);
+ RETURN_FAMILY_TEST(64, add_return, +=, -one);
+ RETURN_FAMILY_TEST(64, sub_return, -=, onestwos);
+ RETURN_FAMILY_TEST(64, sub_return, -=, -one);
+
+ FETCH_FAMILY_TEST(64, fetch_add, +=, onestwos);
+ FETCH_FAMILY_TEST(64, fetch_add, +=, -one);
+ FETCH_FAMILY_TEST(64, fetch_sub, -=, onestwos);
+ FETCH_FAMILY_TEST(64, fetch_sub, -=, -one);
+
+ FETCH_FAMILY_TEST(64, fetch_or, |=, v1);
+ FETCH_FAMILY_TEST(64, fetch_and, &=, v1);
+ FETCH_FAMILY_TEST(64, fetch_andnot, &= ~, v1);
+ FETCH_FAMILY_TEST(64, fetch_xor, ^=, v1);
+
+ INIT(v0);
+ atomic64_inc(&v);
+ r += one;
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ atomic64_dec(&v);
+ r -= one;
+ BUG_ON(v.counter != r);
+
+ INC_RETURN_FAMILY_TEST(64, v0);
+ DEC_RETURN_FAMILY_TEST(64, v0);
+
+ XCHG_FAMILY_TEST(64, v0, v1);
+ CMPXCHG_FAMILY_TEST(64, v0, v1, v2);
+
+ INIT(v0);
+ BUG_ON(atomic64_add_unless(&v, one, v0));
+ BUG_ON(v.counter != r);
+
+ INIT(v0);
+ BUG_ON(!atomic64_add_unless(&v, one, v1));
+ r += one;
+ BUG_ON(v.counter != r);
+
+ INIT(onestwos);
+ BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
+ r -= one;
+ BUG_ON(v.counter != r);
+
+ INIT(0);
+ BUG_ON(atomic64_dec_if_positive(&v) != -one);
+ BUG_ON(v.counter != r);
+
+ INIT(-one);
+ BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
+ BUG_ON(v.counter != r);
+
+ INIT(onestwos);
+ BUG_ON(!atomic64_inc_not_zero(&v));
+ r += one;
+ BUG_ON(v.counter != r);
+
+ INIT(0);
+ BUG_ON(atomic64_inc_not_zero(&v));
+ BUG_ON(v.counter != r);
+
+ INIT(-one);
+ BUG_ON(!atomic64_inc_not_zero(&v));
+ r += one;
+ BUG_ON(v.counter != r);
+
+ /* Confirm the return value fits in an int, even if the value doesn't */
+ INIT(v3);
+ r_int = atomic64_inc_not_zero(&v);
+ BUG_ON(!r_int);
+}
+
+static __init int test_atomics_init(void)
+{
+ test_atomic();
+ test_atomic64();
+
+#ifdef CONFIG_X86
+ pr_info("passed for %s platform %s CX8 and %s SSE\n",
+#ifdef CONFIG_X86_64
+ "x86-64",
+#elif defined(CONFIG_X86_CX8)
+ "i586+",
+#else
+ "i386+",
+#endif
+ boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
+ boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
+#else
+ pr_info("passed\n");
+#endif
+
+ return 0;
+}
+
+static __exit void test_atomics_exit(void) {}
+
+module_init(test_atomics_init);
+module_exit(test_atomics_exit);
+
+MODULE_DESCRIPTION("Testsuite for atomic64_t functions");
+MODULE_LICENSE("GPL");