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| author | Greg Kurz <gkurz@linux.vnet.ibm.com> | 2015-02-23 16:14:19 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-03-18 10:48:59 +1100 |
| commit | 9d0e6d9db56a38e205e7138837b885082dc769ec (patch) | |
| tree | 4b8eec6f84f5cd97d75e8f9cd6573452e54c8e2c | |
| parent | 52d99627003278bcd1a40ea45136a8148d351531 (diff) | |
| download | blackbird-op-linux-9d0e6d9db56a38e205e7138837b885082dc769ec.tar.gz blackbird-op-linux-9d0e6d9db56a38e205e7138837b885082dc769ec.zip | |
powerpc/vphn: clarify the H_HOME_NODE_ASSOCIATIVITY API
The number of values returned by the H_HOME_NODE_ASSOCIATIVITY h_call deserves
to be explicitly defined, for a better understanding of the code.
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/mm/numa.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 0257a7d659ef..7a5bc21152f6 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -1247,11 +1247,15 @@ static int update_cpu_associativity_changes_mask(void) return cpumask_weight(changes); } +/* The H_HOME_NODE_ASSOCIATIVITY h_call returns 6 64-bit registers. + */ +#define VPHN_REGISTER_COUNT 6 + /* * 6 64-bit registers unpacked into 12 32-bit associativity values. To form * the complete property we have to add the length in the first cell. */ -#define VPHN_ASSOC_BUFSIZE (6*sizeof(u64)/sizeof(u32) + 1) +#define VPHN_ASSOC_BUFSIZE (VPHN_REGISTER_COUNT*sizeof(u64)/sizeof(u32) + 1) /* * Convert the associativity domain numbers returned from the hypervisor @@ -1309,7 +1313,7 @@ static long hcall_vphn(unsigned long cpu, __be32 *associativity) int i; rc = plpar_hcall9(H_HOME_NODE_ASSOCIATIVITY, retbuf, flags, hwcpu); - for (i = 0; i < 6; i++) + for (i = 0; i < VPHN_REGISTER_COUNT; i++) retbuf[i] = cpu_to_be64(retbuf[i]); vphn_unpack_associativity(retbuf, associativity); |
