x86/intel_rdt: Making CBM name and type more explicit

cbm_validate() receives a pointer to the variable that will be initialized
with a validated capacity bitmask. The pointer points to a variable of type
unsigned long that is immediately assigned to a variable of type u32 by the
caller on return from cbm_validate().

Let cbm_validate() initialize a variable of type u32 directly.

At this time also change tha variable name "data" within parse_cbm() to a
name more reflective of the content: "cbm_val". This frees up the generic
"data" to be used later when it is indeed used for a collection of input.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: fenghua.yu@intel.com
Cc: tony.luck@intel.com
Cc: vikas.shivappa@linux.intel.com
Cc: gavin.hindman@intel.com
Cc: jithu.joseph@intel.com
Cc: dave.hansen@intel.com
Cc: hpa@zytor.com
Link: https://lkml.kernel.org/r/5e29cf0209ea2deac9beacd35cbe5239a50959fb.1529706536.git.reinette.chatre@intel.com

diff --git a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
index 2c23bb136ccc72314b4119f199d83e8c674a2b11..b3da5b981dd851b27eaf462553856dfb8fbe75c6 100644 (file)
--- a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
+++ b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
@@ -87,7 +87,7 @@ int parse_bw(char *buf, struct rdt_resource *r, struct rdt_domain *d)
  *     are allowed (e.g. FFFFH, 0FF0H, 003CH, etc.).
  * Additionally Haswell requires at least two bits set.
  */
-static bool cbm_validate(char *buf, unsigned long *data, struct rdt_resource *r)
+static bool cbm_validate(char *buf, u32 *data, struct rdt_resource *r)
 {
        unsigned long first_bit, zero_bit, val;
        unsigned int cbm_len = r->cache.cbm_len;
@@ -128,16 +128,17 @@ static bool cbm_validate(char *buf, unsigned long *data, struct rdt_resource *r)
  */
 int parse_cbm(char *buf, struct rdt_resource *r, struct rdt_domain *d)
 {
-       unsigned long data;
+       u32 cbm_val;
 
        if (d->have_new_ctrl) {
                rdt_last_cmd_printf("duplicate domain %d\n", d->id);
                return -EINVAL;
        }
 
-       if(!cbm_validate(buf, &data, r))
+       if (!cbm_validate(buf, &cbm_val, r))
                return -EINVAL;
-       d->new_ctrl = data;
+
+       d->new_ctrl = cbm_val;
        d->have_new_ctrl = true;
 
        return 0;