linux-kernel - [tip: timers/urgent] time: Correct the prototype of ns_to_kernel_old_timeval and ns_to

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Date:   Tue, 09 Aug 2022 18:04:55 -0000
From:   "tip-bot2 for Youngmin Nam" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Youngmin Nam <youngmin.nam@...sung.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Arnd Bergmann <arnd@...db.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: timers/urgent] time: Correct the prototype of
 ns_to_kernel_old_timeval and ns_to_timespec64

The following commit has been merged into the timers/urgent branch of tip:

Commit-ID:     46dae32fe625a75f549c3a70edc77b778197bb05
Gitweb:        https://git.kernel.org/tip/46dae32fe625a75f549c3a70edc77b778197bb05
Author:        Youngmin Nam <youngmin.nam@...sung.com>
AuthorDate:    Tue, 12 Jul 2022 18:47:15 +09:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Tue, 09 Aug 2022 20:02:13 +02:00

time: Correct the prototype of ns_to_kernel_old_timeval and ns_to_timespec64

In ns_to_kernel_old_timeval() definition, the function argument is defined
with const identifier in kernel/time/time.c, but the prototype in
include/linux/time32.h looks different.

- The function is defined in kernel/time/time.c as below:
  struct __kernel_old_timeval ns_to_kernel_old_timeval(const s64 nsec)

- The function is decalared in include/linux/time32.h as below:
  extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec);

Because the variable of arithmethic types isn't modified in the calling scope,
there's no need to mark arguments as const, which was already mentioned during 
review (Link[1) of the original patch.

Likewise remove the "const" keyword in both definition and declaration of
ns_to_timespec64() as requested by Arnd (Link[2]).

Fixes: a84d1169164b ("y2038: Introduce struct __kernel_old_timeval")
Signed-off-by: Youngmin Nam <youngmin.nam@...sung.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Link: https://lore.kernel.org/all/20220712094715.2918823-1-youngmin.nam@samsung.com
Link[1]: https://lore.kernel.org/all/20180310081123.thin6wphgk7tongy@gmail.com/
Link[2]: https://lore.kernel.org/all/CAK8P3a3nknJgEDESGdJH91jMj6R_xydFqWASd8r5BbesdvMBgA@mail.gmail.com/

---
 include/linux/time64.h | 2 +-
 kernel/time/time.c     | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/time64.h b/include/linux/time64.h
index 2fb8232..f1bcea8 100644
--- a/include/linux/time64.h
+++ b/include/linux/time64.h
@@ -145,7 +145,7 @@ static inline s64 timespec64_to_ns(const struct timespec64 *ts)
  *
  * Returns the timespec64 representation of the nsec parameter.
  */
-extern struct timespec64 ns_to_timespec64(const s64 nsec);
+extern struct timespec64 ns_to_timespec64(s64 nsec);
 
 /**
  * timespec64_add_ns - Adds nanoseconds to a timespec64
diff --git a/kernel/time/time.c b/kernel/time/time.c
index 29923b2..526257b 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -449,7 +449,7 @@ time64_t mktime64(const unsigned int year0, const unsigned int mon0,
 }
 EXPORT_SYMBOL(mktime64);
 
-struct __kernel_old_timeval ns_to_kernel_old_timeval(const s64 nsec)
+struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec)
 {
 	struct timespec64 ts = ns_to_timespec64(nsec);
 	struct __kernel_old_timeval tv;
@@ -503,7 +503,7 @@ EXPORT_SYMBOL(set_normalized_timespec64);
  *
  * Returns the timespec64 representation of the nsec parameter.
  */
-struct timespec64 ns_to_timespec64(const s64 nsec)
+struct timespec64 ns_to_timespec64(s64 nsec)
 {
 	struct timespec64 ts = { 0, 0 };
 	s32 rem;