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Message-ID: <20240531195720.232561-3-tony.luck@intel.com>
Date: Fri, 31 May 2024 12:57:19 -0700
From: Tony Luck <tony.luck@...el.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
Borislav Petkov <bp@...en8.de>
Cc: Fenghua Yu <fenghua.yu@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>,
Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
Peter Newman <peternewman@...gle.com>,
James Morse <james.morse@....com>,
Babu Moger <babu.moger@....com>,
Drew Fustini <dfustini@...libre.com>,
Dave Martin <Dave.Martin@....com>,
linux-kernel@...r.kernel.org,
patches@...ts.linux.dev,
Tony Luck <tony.luck@...el.com>
Subject: [PATCH 2/3] x86/resctrl: Replace open code cacheinfo search in pseudo_lock_region_init()
Use get_cpu_cacheinfo_level() instead of open coded search.
Signed-off-by: Tony Luck <tony.luck@...el.com>
---
arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
index aacf236dfe3b..1bbfd3c1e300 100644
--- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
+++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
@@ -292,9 +292,8 @@ static void pseudo_lock_region_clear(struct pseudo_lock_region *plr)
*/
static int pseudo_lock_region_init(struct pseudo_lock_region *plr)
{
- struct cpu_cacheinfo *ci;
+ struct cacheinfo *ci;
int ret;
- int i;
/* Pick the first cpu we find that is associated with the cache. */
plr->cpu = cpumask_first(&plr->d->cpu_mask);
@@ -306,15 +305,11 @@ static int pseudo_lock_region_init(struct pseudo_lock_region *plr)
goto out_region;
}
- ci = get_cpu_cacheinfo(plr->cpu);
-
- plr->size = rdtgroup_cbm_to_size(plr->s->res, plr->d, plr->cbm);
-
- for (i = 0; i < ci->num_leaves; i++) {
- if (ci->info_list[i].level == plr->s->res->cache_level) {
- plr->line_size = ci->info_list[i].coherency_line_size;
- return 0;
- }
+ ci = get_cpu_cacheinfo_level(plr->cpu, plr->s->res->cache_level);
+ if (ci) {
+ plr->line_size = ci->coherency_line_size;
+ plr->size = rdtgroup_cbm_to_size(plr->s->res, plr->d, plr->cbm);
+ return 0;
}
ret = -1;
--
2.45.0
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