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arm64: fix endianness annotation in aarch64_insn_read() 

The function arch64_insn_read() is used to read an instruction.
On AM64 instructions are always stored in little-endian order
and thus the function correctly do a little-to-native endian
conversion to the value just read.

However, the variable used to hold the value before the conversion
is not declared for a little-endian value but for a native one.

Fix this by using the correct type for the declaration: __le32

Note: This only works because the function reading the value,
      probe_kernel_read((), takes a void pointer and void pointers
      are endian-agnostic. Otherwise probe_kernel_read() should
      also be properly annotated (or worse, need to be specialized).

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Luc Van Oostenryck 2017-06-28 16:58:09 +02:00 committed by Will Deacon
parent 6cf5d4af83
commit 65de142143
1 changed files with 1 additions and 1 deletions
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arch/arm64/kernel/insn.c
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@ -117,7 +117,7 @@ static void __kprobes patch_unmap(int fixmap)
int __kprobes aarch64_insn_read(void *addr, u32 *insnp)
{
int ret;
u32 val;
__le32 val;
ret = probe_kernel_read(&val, addr, AARCH64_INSN_SIZE);
if (!ret)