The following commit has been merged into the timers/vdso branch of tip: Commit-ID: 3f58d4793b5d43e5b91876d712b808de8099ff2a Gitweb: https://git.kernel.org/tip/3f58d4793b5d43e5b91876d712b808de8099ff2a Author: Anna-Maria Behnsen <anna-maria@xxxxxxxxxxxxx> AuthorDate: Tue, 25 Feb 2025 13:36:46 +01:00 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitterDate: Mon, 03 Mar 2025 10:24:35 +01:00 time/namespace: Prepare introduction of struct vdso_clock To support multiple PTP clocks, the VDSO data structure needs to be reworked. All clock specific data will end up in struct vdso_clock and in struct vdso_time_data there will be array of it. By now, vdso_clock is simply a define which maps vdso_clock to vdso_time_data. To prepare for the rework of the data structures, replace the struct vdso_time_data pointer with struct vdso_clock pointer whenever applicable. No functional change. Signed-off-by: Anna-Maria Behnsen <anna-maria@xxxxxxxxxxxxx> Signed-off-by: Nam Cao <namcao@xxxxxxxxxxxxx> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@xxxxxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- kernel/time/namespace.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/kernel/time/namespace.c b/kernel/time/namespace.c index f02430a..09bc4fb 100644 --- a/kernel/time/namespace.c +++ b/kernel/time/namespace.c @@ -165,26 +165,26 @@ static struct timens_offset offset_from_ts(struct timespec64 off) * HVCLOCK * VVAR * - * The check for vdso_time_data->clock_mode is in the unlikely path of + * The check for vdso_clock->clock_mode is in the unlikely path of * the seq begin magic. So for the non-timens case most of the time * 'seq' is even, so the branch is not taken. * * If 'seq' is odd, i.e. a concurrent update is in progress, the extra check - * for vdso_time_data->clock_mode is a non-issue. The task is spin waiting for the + * for vdso_clock->clock_mode is a non-issue. The task is spin waiting for the * update to finish and for 'seq' to become even anyway. * - * Timens page has vdso_time_data->clock_mode set to VDSO_CLOCKMODE_TIMENS which + * Timens page has vdso_clock->clock_mode set to VDSO_CLOCKMODE_TIMENS which * enforces the time namespace handling path. */ -static void timens_setup_vdso_clock_data(struct vdso_time_data *vdata, +static void timens_setup_vdso_clock_data(struct vdso_clock *vc, struct time_namespace *ns) { - struct timens_offset *offset = vdata->offset; + struct timens_offset *offset = vc->offset; struct timens_offset monotonic = offset_from_ts(ns->offsets.monotonic); struct timens_offset boottime = offset_from_ts(ns->offsets.boottime); - vdata->seq = 1; - vdata->clock_mode = VDSO_CLOCKMODE_TIMENS; + vc->seq = 1; + vc->clock_mode = VDSO_CLOCKMODE_TIMENS; offset[CLOCK_MONOTONIC] = monotonic; offset[CLOCK_MONOTONIC_RAW] = monotonic; offset[CLOCK_MONOTONIC_COARSE] = monotonic; @@ -220,6 +220,7 @@ static void timens_set_vvar_page(struct task_struct *task, struct time_namespace *ns) { struct vdso_time_data *vdata; + struct vdso_clock *vc; unsigned int i; if (ns == &init_time_ns) @@ -236,9 +237,10 @@ static void timens_set_vvar_page(struct task_struct *task, ns->frozen_offsets = true; vdata = page_address(ns->vvar_page); + vc = vdata; for (i = 0; i < CS_BASES; i++) - timens_setup_vdso_clock_data(&vdata[i], ns); + timens_setup_vdso_clock_data(&vc[i], ns); out: mutex_unlock(&offset_lock);
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