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[IA64] fix csum_ipv6_magic()
The 32-bit parameters (len and csum) of csum_ipv6_magic() are passed in 64-bit
registers in2 and in4. The high order 32 bits of the registers were never
cleared, and garbage was sometimes calculated into the checksum.
Fix this by clearing the high order 32 bits of these registers.
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: Tony Luck <tony.luck@intel.com>
authored by Jiri Bohac and committed by Tony Luck 5afe18d2 f2486f26
+5
-3
arch/ia64/lib/ip_fast_csum.S
+5
-3
arch/ia64/lib/ip_fast_csum.S
···
96
GLOBAL_ENTRY(csum_ipv6_magic)
97
ld4 r20=[in0],4
98
ld4 r21=[in1],4
99
-
dep r15=in3,in2,32,16
100
;;
101
ld4 r22=[in0],4
102
ld4 r23=[in1],4
103
-
mux1 r15=r15,@rev
104
;;
105
ld4 r24=[in0],4
106
ld4 r25=[in1],4
107
-
shr.u r15=r15,16
108
add r16=r20,r21
109
add r17=r22,r23
110
;;
111
ld4 r26=[in0],4
112
ld4 r27=[in1],4
113
add r18=r24,r25
114
add r8=r16,r17
115
;;
···
96
GLOBAL_ENTRY(csum_ipv6_magic)
97
ld4 r20=[in0],4
98
ld4 r21=[in1],4
99
+
zxt4 in2=in2
100
;;
101
ld4 r22=[in0],4
102
ld4 r23=[in1],4
103
+
dep r15=in3,in2,32,16
104
;;
105
ld4 r24=[in0],4
106
ld4 r25=[in1],4
107
+
mux1 r15=r15,@rev
108
add r16=r20,r21
109
add r17=r22,r23
110
+
zxt4 in4=in4
111
;;
112
ld4 r26=[in0],4
113
ld4 r27=[in1],4
114
+
shr.u r15=r15,16
115
add r18=r24,r25
116
add r8=r16,r17
117
;;