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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-10-12 12:40:37 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-10-13 04:28:22 +0200 |
| commit | 602946ec2f90d5bd965857753880db29d2d9a1e9 (patch) | |
| tree | 707091d9b5037c726fa849941974a4ca784d5fcf | |
| parent | powerpc/perf: Expose instruction and data address registers as part of extend... (diff) | |
| download | linux-602946ec2f90d5bd965857753880db29d2d9a1e9.tar.xz linux-602946ec2f90d5bd965857753880db29d2d9a1e9.zip | |
powerpc: Set max_mapnr correctly
max_mapnr is used by virt_addr_valid() to check if a linear
address is valid.
It must only include lowmem PFNs, like other architectures.
Problem detected on a system with 1G mem (Only 768M are mapped), with
CONFIG_DEBUG_VIRTUAL and CONFIG_TEST_DEBUG_VIRTUAL, it didn't report
virt_to_phys(VMALLOC_START), VMALLOC_START being 0xf1000000.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/77d99037782ac4b3c3b0124fc4ae80ce7b760b05.1634035228.git.christophe.leroy@csgroup.eu
| -rw-r--r-- | arch/powerpc/mm/mem.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 05b9c3f31456..bd5d91a31183 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -256,7 +256,7 @@ void __init mem_init(void) #endif high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); - set_max_mapnr(max_pfn); + set_max_mapnr(max_low_pfn); kasan_late_init(); |