mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

lib/vdso: Mark do_hres_timens() and do_coarse_timens() __always_inline() 

In the same spirit as commit c966533f8c ("lib/vdso: Mark do_hres()
and do_coarse() as __always_inline"), mark do_hres_timens() and
do_coarse_timens() __always_inline.

The measurement below in on a non timens process, ie on the fastest path.

On powerpc32, without the patch:

clock-gettime-monotonic-raw:    vdso: 1155 nsec/call
clock-gettime-monotonic-coarse:    vdso: 813 nsec/call
clock-gettime-monotonic:    vdso: 1076 nsec/call

With the patch:

clock-gettime-monotonic-raw:    vdso: 1100 nsec/call
clock-gettime-monotonic-coarse:    vdso: 667 nsec/call
clock-gettime-monotonic:    vdso: 1025 nsec/call

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/90dcf45ebadfd5a07f24241551c62f619d1cb930.1617209142.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2021-03-31 16:48:44 +00:00 committed by Michael Ellerman
parent 8f6cc75a97
commit 58efe9f696
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
lib/vdso/gettimeofday.c
View File

@ -46,8 +46,8 @@ static inline bool vdso_cycles_ok(u64 cycles)
#endif
#ifdef CONFIG_TIME_NS
static int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
static __always_inline int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
{
const struct vdso_data *vd = __arch_get_timens_vdso_data();
const struct timens_offset *offs = &vdns->offset[clk];
@ -97,8 +97,8 @@ static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(void)
return NULL;
}
static int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
static __always_inline int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
{
return -EINVAL;
}
@ -159,8 +159,8 @@ static __always_inline int do_hres(const struct vdso_data *vd, clockid_t clk,
}
#ifdef CONFIG_TIME_NS
static int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
static __always_inline int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
{
const struct vdso_data *vd = __arch_get_timens_vdso_data();
const struct vdso_timestamp *vdso_ts = &vd->basetime[clk];
@ -188,8 +188,8 @@ static int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
return 0;
}
#else
static int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
static __always_inline int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
{
return -1;
}