[lkml]   [2018]   [Apr]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH V3 10/39] 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 <>
arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
index 9e1a455e4d9b..3bd45e6cc9ae 100644
--- a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
+++ b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
@@ -86,7 +86,7 @@ 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;
@@ -127,16 +127,17 @@ 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;
 \ /
  Last update: 2018-04-25 20:27    [W:0.172 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site