powerpc: use memblock functions returning virtual address

Since only the virtual address of allocated blocks is used, lets use
functions returning directly virtual address.

Those functions have the advantage of also zeroing the block.

[rppt@linux.ibm.com: powerpc: remove duplicated alloc_stack() function]
  Link: http://lkml.kernel.org/r/20190226064032.GA5873@rapoport-lnx
[rppt@linux.ibm.com: updated error message in alloc_stack() to be more verbose]
[rppt@linux.ibm.com: convereted several additional call sites ]
Link: http://lkml.kernel.org/r/1548057848-15136-3-git-send-email-rppt@linux.ibm.com
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Guo Ren <ren_guo@c-sky.com>				[c-sky]
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Juergen Gross <jgross@suse.com>			[Xen]
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 10 insertions, 4 deletions

diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index e49bd5efcfe6..28c076c771de 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -810,7 +810,6 @@ static int __init process_cpufeatures_node(unsigned long node,
         int len;
 
         f = &dt_cpu_features[i];
-        memset(f, 0, sizeof(struct dt_cpu_feature));
 
         f->node = node;
 
@@ -1005,7 +1004,7 @@ static int __init dt_cpu_ftrs_scan_callback(unsigned long node, const char
         /* Count and allocate space for cpu features */
         of_scan_flat_dt_subnodes(node, count_cpufeatures_subnodes,
                                                 &nr_dt_cpu_features);
-        dt_cpu_features = __va(memblock_phys_alloc(sizeof(struct dt_cpu_feature) * nr_dt_cpu_features, PAGE_SIZE));
+        dt_cpu_features = memblock_alloc(sizeof(struct dt_cpu_feature) * nr_dt_cpu_features, PAGE_SIZE);
 
         cpufeatures_setup_start(isa);
 
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 8c890c6557ed..e7382abee868 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -196,7 +196,11 @@ void __init allocate_paca_ptrs(void)
         paca_nr_cpu_ids = nr_cpu_ids;
 
         paca_ptrs_size = sizeof(struct paca_struct *) * nr_cpu_ids;
-        paca_ptrs = __va(memblock_phys_alloc(paca_ptrs_size, SMP_CACHE_BYTES));
+        paca_ptrs = memblock_alloc_raw(paca_ptrs_size, SMP_CACHE_BYTES);
+        if (!paca_ptrs)
+                panic("Failed to allocate %d bytes for paca pointers\n",
+                      paca_ptrs_size);
+
         memset(paca_ptrs, 0x88, paca_ptrs_size);
 }
 
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 4181ec715f88..4221527b082f 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -126,7 +126,10 @@ static void __init move_device_tree(void)
         if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) ||
             !memblock_is_memory(start + size - 1) ||
             overlaps_crashkernel(start, size) || overlaps_initrd(start, size)) {
-                p = __va(memblock_phys_alloc(size, PAGE_SIZE));
+                p = memblock_alloc_raw(size, PAGE_SIZE);
+                if (!p)
+                        panic("Failed to allocate %lu bytes to move device tree\n",
+                              size);
                 memcpy(p, initial_boot_params, size);
                 initial_boot_params = p;
                 DBG("Moved device tree to 0x%px\n", p);