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powerpc/code-patching: Add a helper to get the address of a patch_site 

This patch adds a helper to get the address of a patch_site.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Call it "patch site" addr]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2018-10-19 06:55:04 +00:00 committed by Michael Ellerman
parent cc4ebf5c0a
commit 082e2869fc
1 changed files with 5 additions and 0 deletions
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5
arch/powerpc/include/asm/code-patching.h
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@ -36,6 +36,11 @@ int raw_patch_instruction(unsigned int *addr, unsigned int instr);
int patch_instruction_site(s32 *addr, unsigned int instr);
int patch_branch_site(s32 *site, unsigned long target, int flags);
static inline unsigned long patch_site_addr(s32 *site)
{
return (unsigned long)site + *site;
}
int instr_is_relative_branch(unsigned int instr);
int instr_is_relative_link_branch(unsigned int instr);
int instr_is_branch_to_addr(const unsigned int *instr, unsigned long addr);