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authorChristophe Leroy <christophe.leroy@c-s.fr>2016-02-10 10:17:08 +0300
committerScott Wood <oss@buserror.net>2016-03-12 05:04:32 +0300
commit060ef9d89d18ea16f05e7c28875cee068220e248 (patch)
treebb38234ec131b67a9ec2272325feff212ec0f20e /arch/powerpc
parent84d3e2480564949a26870b6750a9168eb11f4c17 (diff)
downloadlinux-060ef9d89d18ea16f05e7c28875cee068220e248.tar.xz
powerpc32: PAGE_EXEC required for inittext
PAGE_EXEC is required for inittext, otherwise CONFIG_DEBUG_PAGEALLOC ends up with an Oops [ 0.000000] Inode-cache hash table entries: 8192 (order: 1, 32768 bytes) [ 0.000000] Sorting __ex_table... [ 0.000000] bootmem::free_all_bootmem_core nid=0 start=0 end=2000 [ 0.000000] Unable to handle kernel paging request for instruction fetch [ 0.000000] Faulting instruction address: 0xc045b970 [ 0.000000] Oops: Kernel access of bad area, sig: 11 [#1] [ 0.000000] PREEMPT DEBUG_PAGEALLOC CMPC885 [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.18.25-local-dirty #1673 [ 0.000000] task: c04d83d0 ti: c04f8000 task.ti: c04f8000 [ 0.000000] NIP: c045b970 LR: c045b970 CTR: 0000000a [ 0.000000] REGS: c04f9ea0 TRAP: 0400 Not tainted (3.18.25-local-dirty) [ 0.000000] MSR: 08001032 <ME,IR,DR,RI> CR: 39955d35 XER: a000ff40 [ 0.000000] GPR00: c045b970 c04f9f50 c04d83d0 00000000 ffffffff c04dcdf4 00000048 c04f6b10 GPR08: c04f6ab0 00000001 c0563488 c04f6ab0 c04f8000 00000000 00000000 b6db6db7 GPR16: 00003474 00000180 00002000 c7fec000 00000000 000003ff 00000176 c0415014 GPR24: c0471018 c0414ee8 c05304e8 c03aeaac c0510000 c0471018 c0471010 00000000 [ 0.000000] NIP [c045b970] free_all_bootmem+0x164/0x228 [ 0.000000] LR [c045b970] free_all_bootmem+0x164/0x228 [ 0.000000] Call Trace: [ 0.000000] [c04f9f50] [c045b970] free_all_bootmem+0x164/0x228 (unreliable) [ 0.000000] [c04f9fa0] [c0454044] mem_init+0x3c/0xd0 [ 0.000000] [c04f9fb0] [c045080c] start_kernel+0x1f4/0x390 [ 0.000000] [c04f9ff0] [c0002214] start_here+0x38/0x98 [ 0.000000] Instruction dump: [ 0.000000] 2f150000 7f968840 72a90001 3ad60001 56b5f87e 419a0028 419e0024 41a20018 [ 0.000000] 807cc20c 38800000 7c638214 4bffd2f5 <3a940001> 3a100024 4bffffc8 7e368b78 [ 0.000000] ---[ end trace dc8fa200cb88537f ]--- Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/mm/pgtable_32.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 815ccd780ac2..bf7bf32b54f8 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -40,7 +40,7 @@
unsigned long ioremap_bot;
EXPORT_SYMBOL(ioremap_bot); /* aka VMALLOC_END */
-extern char etext[], _stext[];
+extern char etext[], _stext[], _sinittext[], _einittext[];
#define PGDIR_ORDER (32 + PGD_T_LOG2 - PGDIR_SHIFT)
@@ -289,7 +289,8 @@ void __init __mapin_ram_chunk(unsigned long offset, unsigned long top)
v = PAGE_OFFSET + s;
p = memstart_addr + s;
for (; s < top; s += PAGE_SIZE) {
- ktext = ((char *) v >= _stext && (char *) v < etext);
+ ktext = ((char *)v >= _stext && (char *)v < etext) ||
+ ((char *)v >= _sinittext && (char *)v < _einittext);
f = ktext ? pgprot_val(PAGE_KERNEL_TEXT) : pgprot_val(PAGE_KERNEL);
map_page(v, p, f);
#ifdef CONFIG_PPC_STD_MMU_32