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powerpc: Add a probe_user_read_inst() function

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Introduce a probe_user_read_inst() function to use in cases where
probe_user_read() is used for getting an instruction. This will be
more useful for prefixed instructions.

Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Alistair Popple <alistair@popple.id.au>
[mpe: Don't write to *inst on error, fold in __user annotations]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200506034050.24806-14-jniethe5@gmail.com
This commit is contained in:
Jordan Niethe
2020-05-06 13:40:33 +10:00
committed by Michael Ellerman
parent f8faaffaa7
commit 7ba68b2172
4 changed files with 26 additions and 3 deletions
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2
arch/powerpc/lib/Makefile
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@@ -16,7 +16,7 @@ CFLAGS_code-patching.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_feature-fixups.o += -DDISABLE_BRANCH_PROFILING
endif
obj-y += alloc.o code-patching.o feature-fixups.o pmem.o
obj-y += alloc.o code-patching.o feature-fixups.o pmem.o inst.o
ifndef CONFIG_KASAN
obj-y += string.o memcmp_$(BITS).o