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authorHari Bathini <hbathini@linux.ibm.com>2019-09-11 20:17:56 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2019-09-14 00:04:41 +1000
commit72aa651795f0e9f48bfdb2b2dd0b3e6900351d2a (patch)
tree92c8254d3f7e202cb05e95dff24d17659eefd27e /arch/powerpc/kernel
parent8468d155450c89adbb400cdae42bd4095f3045a9 (diff)
downloadlinux-72aa651795f0e9f48bfdb2b2dd0b3e6900351d2a.tar.bz2
powerpc/fadump: use helper functions to reserve/release cpu notes buffer
Use helper functions to simplify memory allocation, pinning down and freeing the memory used for CPU notes buffer. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/156821323555.5656.2486038022572739622.stgit@hbathini.in.ibm.com
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/fadump.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index eb0745e418db..994fc09e9cbf 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -786,33 +786,24 @@ void fadump_update_elfcore_header(char *bufp)
static void *fadump_alloc_buffer(unsigned long size)
{
- void *vaddr;
+ unsigned long count, i;
struct page *page;
- unsigned long order, count, i;
+ void *vaddr;
- order = get_order(size);
- vaddr = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, order);
+ vaddr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
if (!vaddr)
return NULL;
- count = 1 << order;
+ count = PAGE_ALIGN(size) / PAGE_SIZE;
page = virt_to_page(vaddr);
for (i = 0; i < count; i++)
- SetPageReserved(page + i);
+ mark_page_reserved(page + i);
return vaddr;
}
static void fadump_free_buffer(unsigned long vaddr, unsigned long size)
{
- struct page *page;
- unsigned long order, count, i;
-
- order = get_order(size);
- count = 1 << order;
- page = virt_to_page(vaddr);
- for (i = 0; i < count; i++)
- ClearPageReserved(page + i);
- __free_pages(page, order);
+ free_reserved_area((void *)vaddr, (void *)(vaddr + size), -1, NULL);
}
s32 fadump_setup_cpu_notes_buf(u32 num_cpus)