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authorDavid Howells <dhowells@redhat.com>2011-03-28 12:53:29 +0100
committerDavid Howells <dhowells@redhat.com>2011-03-28 12:53:29 +0100
commiteac522ef438f8ea173569fd0469371bc5d317947 (patch)
tree890a1a68a65768b9f0de66083e566737a65c8483 /mm
parent16c29dafcc86024048f1dbb8349d31cb22c7c55a (diff)
downloadop-kernel-dev-eac522ef438f8ea173569fd0469371bc5d317947.zip
op-kernel-dev-eac522ef438f8ea173569fd0469371bc5d317947.tar.gz
NOMMU: percpu should use is_vmalloc_addr().
per_cpu_ptr_to_phys() uses VMALLOC_START and VMALLOC_END to determine if an address is in the vmalloc() region or not. This is incorrect on NOMMU as there is no real vmalloc() capability (vmalloc() is emulated by kmalloc()). The correct way to do this is to use is_vmalloc_addr(). This encapsulates the vmalloc() region test in MMU mode and just returns 0 in NOMMU mode. On FRV in NOMMU mode, the percpu compilation fails without this patch: mm/percpu.c: In function 'per_cpu_ptr_to_phys': mm/percpu.c:1011: error: 'VMALLOC_START' undeclared (first use in this function) mm/percpu.c:1011: error: (Each undeclared identifier is reported only once mm/percpu.c:1011: error: for each function it appears in.) mm/percpu.c:1012: error: 'VMALLOC_END' undeclared (first use in this function) mm/percpu.c:1018: warning: control reaches end of non-void function Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'mm')
-rw-r--r--mm/percpu.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/percpu.c b/mm/percpu.c
index 3f93001..55d4d11 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1008,8 +1008,7 @@ phys_addr_t per_cpu_ptr_to_phys(void *addr)
}
if (in_first_chunk) {
- if ((unsigned long)addr < VMALLOC_START ||
- (unsigned long)addr >= VMALLOC_END)
+ if (!is_vmalloc_addr(addr))
return __pa(addr);
else
return page_to_phys(vmalloc_to_page(addr));
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