library: ain't like your father's delta, <MEMINFO> api

When the code for DELTA values (among other stuff) was
stolen from the recently revised <stat> interface, the
concept of ever growing values was propagated too. But
here we must manage both growing and shrinking values.

Thus former protections against a negative delta don't
have any place in this module and are hereby banished.

Signed-off-by: Jim Warner <james.warner@comcast.net>

diff --git a/proc/meminfo.c b/proc/meminfo.c
index b3a3e56df999e010dd8b7208e2a3345546c6eeb5..ba6cad51d44467931f91661f627d3c04e35ae76c 100644 (file)
--- a/proc/meminfo.c
+++ b/proc/meminfo.c
@@ -124,8 +124,7 @@ struct procps_meminfo {
 // regular assignment
 #define MEM_set(e,t,x) setDECL(e) { R->result. t = H->new . x; }
 // delta assignment
-#define HST_set(e,t,x) setDECL(e) { R->result. t = ( H->new . x - H->old. x ); \
-    if (R->result. t < 0) R->result. t = 0; }
+#define HST_set(e,t,x) setDECL(e) { R->result. t = ( H->new . x - H->old. x ); }
 
 setDECL(noop)                { (void)R; (void)H; }
 setDECL(extra)               { (void)R; (void)H; }
@@ -233,8 +232,7 @@ MEM_set(SWAP_USED,              ul_int,  derived_swap_used)
 // regular get
 #define MEM_get(e,x) getDECL(e) { return I->mem_hist.new. x; }
 // delta get
-#define HST_get(e,x) getDECL(e) { int n = I->mem_hist.new. x - I->mem_hist.old. x; \
-    return ( n < 0 ? 0 : n ); }
+#define HST_get(e,x) getDECL(e) { return ( I->mem_hist.new. x - I->mem_hist.old. x ); }
 
 getDECL(noop)                { (void)I; return 0; }
 getDECL(extra)               { (void)I; return 0; }