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Code Issues Releases Wiki Activity

powerpc/pseries/iommu: Fix set but not used values 

The commit b7d6bf4fdd ("powerpc/pseries/pci: Remove obsolete SW
invalidate") left 2 variables unused.

  arch/powerpc/platforms/pseries/iommu.c:108:17: warning: variable 'tces' set but not used
    __be64 *tcep, *tces;
                   ^~~~

  arch/powerpc/platforms/pseries/iommu.c:132:17: warning: variable 'tces' set but not used
    __be64 *tcep, *tces;
                   ^~~~

Also, the commit 68c0449ea1 ("powerpc/pseries/iommu: Use memory@
nodes in max RAM address calculation") set "ranges" in
ddw_memory_hotplug_max() but never use it.

  arch/powerpc/platforms/pseries/iommu.c: In function 'ddw_memory_hotplug_max':
  arch/powerpc/platforms/pseries/iommu.c:948:7: warning: variable 'ranges' set but not used
     int ranges, n_mem_addr_cells, n_mem_size_cells, len;
         ^~~~~~

Signed-off-by: Qian Cai <cai@lca.pw>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Qian Cai 2019-04-06 22:48:08 -04:00 committed by Michael Ellerman
parent bff25143da
commit c05f57fdc3
1 changed files with 5 additions and 8 deletions
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13
arch/powerpc/platforms/pseries/iommu.c
View File

@ -105,7 +105,7 @@ static int tce_build_pSeries(struct iommu_table *tbl, long index,
unsigned long attrs)
{
u64 proto_tce;
__be64 *tcep, *tces;
__be64 *tcep;
u64 rpn;
proto_tce = TCE_PCI_READ; // Read allowed
@ -113,7 +113,7 @@ static int tce_build_pSeries(struct iommu_table *tbl, long index,
if (direction != DMA_TO_DEVICE)
proto_tce |= TCE_PCI_WRITE;
tces = tcep = ((__be64 *)tbl->it_base) + index;
tcep = ((__be64 *)tbl->it_base) + index;
while (npages--) {
/* can't move this out since we might cross MEMBLOCK boundary */
@ -129,9 +129,9 @@ static int tce_build_pSeries(struct iommu_table *tbl, long index,
static void tce_free_pSeries(struct iommu_table *tbl, long index, long npages)
{
__be64 *tcep, *tces;
__be64 *tcep;
tces = tcep = ((__be64 *)tbl->it_base) + index;
tcep = ((__be64 *)tbl->it_base) + index;
while (npages--)
*(tcep++) = 0;
@ -945,7 +945,7 @@ static phys_addr_t ddw_memory_hotplug_max(void)
for_each_node_by_type(memory, "memory") {
unsigned long start, size;
int ranges, n_mem_addr_cells, n_mem_size_cells, len;
int n_mem_addr_cells, n_mem_size_cells, len;
const __be32 *memcell_buf;
memcell_buf = of_get_property(memory, "reg", &len);
@ -955,9 +955,6 @@ static phys_addr_t ddw_memory_hotplug_max(void)
n_mem_addr_cells = of_n_addr_cells(memory);
n_mem_size_cells = of_n_size_cells(memory);
/* ranges in cell */
ranges = (len >> 2) / (n_mem_addr_cells + n_mem_size_cells);
start = of_read_number(memcell_buf, n_mem_addr_cells);
memcell_buf += n_mem_addr_cells;
size = of_read_number(memcell_buf, n_mem_size_cells);