time: Add MODULE_DESCRIPTION() to time test modules

Fix the make W=1 warnings:

WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/time/clocksource-wdtest.o
WARNING: modpost: missing MODULE_DE

time: Add MODULE_DESCRIPTION() to time test modules

Fix the make W=1 warnings:

WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/time/clocksource-wdtest.o
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/time/test_udelay.o
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/time/time_test.o

Signed-off-by: Jeff Johnson <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Paul E. McKenney <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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time/debug: Fix memory leak with using debugfs_lookup()

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make things simpler, jus

time/debug: Fix memory leak with using debugfs_lookup()

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic at
once.

Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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kernel/time/test_udelay.c: fix memory leak with using debugfs_lookup()

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make thin

kernel/time/test_udelay.c: fix memory leak with using debugfs_lookup()

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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time/debug: Remove dentry pointer for debugfs

There is no need to keep the dentry pointer around for the created
debugfs file, as it is only needed when removing it from the system.
When it is to be

time/debug: Remove dentry pointer for debugfs

There is no need to keep the dentry pointer around for the created
debugfs file, as it is only needed when removing it from the system.
When it is to be removed, ask debugfs itself for the pointer, to save on
storage and make things a bit simpler.

Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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time/debug: Remove license boilerplate

The SPDX identifier is enough. Remove the license boilerplate.

Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Kees Cook <[email protected]>

time/debug: Remove license boilerplate

The SPDX identifier is enough. Remove the license boilerplate.

Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Kees Cook <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Acked-by: John Stultz <[email protected]>
Acked-by: Corey Minyard <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Peter Anvin <[email protected]>
Cc: Russell King <[email protected]>
Cc: Richard Cochran <[email protected]>
Cc: "Paul E. McKenney" <[email protected]>
Cc: Nicolas Pitre <[email protected]>
Cc: David Riley <[email protected]>
Cc: Colin Cross <[email protected]>
Cc: Mark Brown <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

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time: Add SPDX license identifiers

Update the time(r) core files files with the correct SPDX license
identifier based on the license text in the file itself. The SPDX
identifier is a legally binding

time: Add SPDX license identifiers

Update the time(r) core files files with the correct SPDX license
identifier based on the license text in the file itself. The SPDX
identifier is a legally binding shorthand, which can be used instead of the
full boiler plate text.

This work is based on a script and data from Philippe Ombredanne, Kate
Stewart and myself. The data has been created with two independent license
scanners and manual inspection.

The following files do not contain any direct license information and have
been omitted from the big initial SPDX changes:

timeconst.bc: The .bc files were not touched
time.c, timer.c, timekeeping.c: Licence was deduced from EXPORT_SYMBOL_GPL

As those files do not contain direct license references they fall under the
project license, i.e. GPL V2 only.

Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Kees Cook <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Acked-by: John Stultz <[email protected]>
Acked-by: Corey Minyard <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Kate Stewart <[email protected]>
Cc: Philippe Ombredanne <[email protected]>
Cc: Russell King <[email protected]>
Cc: Richard Cochran <[email protected]>
Cc: Nicolas Pitre <[email protected]>
Cc: David Riley <[email protected]>
Cc: Colin Cross <[email protected]>
Cc: Mark Brown <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

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time: Avoid timespec in udelay_test

udelay_test_single() uses ktime_get_ts() to get two timespec values
and calculate the difference between them, while udelay_test_show()
uses the same to printk()

time: Avoid timespec in udelay_test

udelay_test_single() uses ktime_get_ts() to get two timespec values
and calculate the difference between them, while udelay_test_show()
uses the same to printk() the current monotonic time.

Both of these are y2038 safe on all machines, but we want to
get rid of struct timespec anyway, so this converts the code to
use ktime_get_ns() and ktime_get_ts64() respectively.

Cc: Prarit Bhargava <[email protected]>
Cc: Richard Cochran <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: John Stultz <[email protected]>

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time: Rename udelay_test.c to test_udelay.c

Kees requested that this test module be renamed for consistency sake,
so this patch renames the udelay_test.c file (recently added to
tip/timers/core for

time: Rename udelay_test.c to test_udelay.c

Kees requested that this test module be renamed for consistency sake,
so this patch renames the udelay_test.c file (recently added to
tip/timers/core for 3.17) to test_udelay.c

Cc: Kees Cook <[email protected]>
Cc: Greg KH <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Linux-Next <[email protected]>
Cc: David Riley <[email protected]>
Signed-off-by: John Stultz <[email protected]>

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