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vdso/gettimeofday: Introduce vdso_clockid_valid()

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Move the clock ID validation check into a common helper.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-7-df7d9f87b9b8@linutronix.de
This commit is contained in:
Thomas Weißschuh
2025-07-01 10:58:01 +02:00
committed by Thomas Gleixner
parent fb61bdb27f
commit 1a1cd5fe88
1 changed files with 8 additions and 4 deletions
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12
lib/vdso/gettimeofday.c
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@@ -71,6 +71,12 @@ static inline bool vdso_cycles_ok(u64 cycles)
}
#endif
static __always_inline bool vdso_clockid_valid(clockid_t clock)
{
/* Check for negative values or invalid clocks */
return likely((u32) clock < MAX_CLOCKS);
}
#ifdef CONFIG_TIME_NS
#ifdef CONFIG_GENERIC_VDSO_DATA_STORE
@@ -268,8 +274,7 @@ __cvdso_clock_gettime_common(const struct vdso_time_data *vd, clockid_t clock,
const struct vdso_clock *vc = vd->clock_data;
u32 msk;
/* Check for negative values or invalid clocks */
if (unlikely((u32) clock >= MAX_CLOCKS))
if (!vdso_clockid_valid(clock))
return false;
/*
@@ -405,8 +410,7 @@ bool __cvdso_clock_getres_common(const struct vdso_time_data *vd, clockid_t cloc
u32 msk;
u64 ns;
/* Check for negative values or invalid clocks */
if (unlikely((u32) clock >= MAX_CLOCKS))
if (!vdso_clockid_valid(clock))
return false;
if (IS_ENABLED(CONFIG_TIME_NS) &&