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powerpc: Curb objtool unannotated intra-function call warnings

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objtool throws the following unannotated intra-function call warnings:
arch/powerpc/kernel/entry_64.o: warning: objtool: .text+0x4: unannotated intra-function call
arch/powerpc/kvm/book3s_hv_rmhandlers.o: warning: objtool: .text+0xe64: unannotated intra-function call
arch/powerpc/kvm/book3s_hv_rmhandlers.o: warning: objtool: .text+0xee4: unannotated intra-function call

Fix these warnings by annotating intra-function calls, using
ANNOTATE_INTRA_FUNCTION_CALL macro, to indicate that the branch targets
are valid.

Tested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Sathvika Vasireddy <sv@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221114175754.1131267-5-sv@linux.ibm.com
This commit is contained in:
Sathvika Vasireddy 2022-11-14 23:27:42 +05:30 committed by Michael Ellerman
parent 29a011fc79
commit 8d0c21b506
2 changed files with 5 additions and 0 deletions
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2
arch/powerpc/kernel/entry_64.S
View file

@ -14,6 +14,7 @@
* code, and exception/interrupt return code for PowerPC.
*/
#include <linux/objtool.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <asm/cache.h>
@ -73,6 +74,7 @@ flush_branch_caches:
// Flush the link stack
.rept 64
ANNOTATE_INTRA_FUNCTION_CALL
bl .+4
.endr
b 1f

3
arch/powerpc/kvm/book3s_hv_rmhandlers.S
View file

@ -11,6 +11,7 @@
*/
#include <linux/linkage.h>
#include <linux/objtool.h>
#include <asm/ppc_asm.h>
#include <asm/code-patching-asm.h>
#include <asm/kvm_asm.h>
@ -1523,12 +1524,14 @@ kvm_flush_link_stack:
/* Flush the link stack. On Power8 it's up to 32 entries in size. */
.rept 32
ANNOTATE_INTRA_FUNCTION_CALL
bl .+4
.endr
/* And on Power9 it's up to 64. */
BEGIN_FTR_SECTION
.rept 32
ANNOTATE_INTRA_FUNCTION_CALL
bl .+4
.endr
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)