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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2018-08-09 08:14:41 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-08-10 22:12:35 +1000 |
| commit | fa54a981ea7a852c145b05c95abba11e81fc1157 (patch) | |
| tree | cea88a64419bfe83d3e94e84cd154c0595278fa5 /arch/powerpc/kernel/setup_32.c | |
| parent | cd813e1cd7122f2c261dce5b54d1e0c97f80e1a5 (diff) | |
| download | linux-fa54a981ea7a852c145b05c95abba11e81fc1157.tar.bz2 | |
powerpc/lib: Use patch_site to patch copy_32 functions once cache is enabled
The symbol memcpy_nocache_branch defined in order to allow patching
of memset function once cache is enabled leads to confusing reports
by perf tool.
Using the new patch_site functionality solves this issue.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/setup_32.c')
| -rw-r--r-- | arch/powerpc/kernel/setup_32.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index 0e3743343280..ba969278bf4d 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -97,11 +97,10 @@ notrace unsigned long __init early_init(unsigned long dt_ptr) * We do the initial parsing of the flat device-tree and prepares * for the MMU to be fully initialized. */ -extern unsigned int memset_nocache_branch; /* Insn to be replaced by NOP */ - notrace void __init machine_init(u64 dt_ptr) { - unsigned int *addr = &memset_nocache_branch; + unsigned int *addr = (unsigned int *)((unsigned long)&patch__memset_nocache + + patch__memset_nocache); unsigned long insn; /* Configure static keys first, now that we're relocated. */ @@ -110,7 +109,7 @@ notrace void __init machine_init(u64 dt_ptr) /* Enable early debugging if any specified (see udbg.h) */ udbg_early_init(); - patch_instruction((unsigned int *)&memcpy, PPC_INST_NOP); + patch_instruction_site(&patch__memcpy_nocache, PPC_INST_NOP); insn = create_cond_branch(addr, branch_target(addr), 0x820000); patch_instruction(addr, insn); /* replace b by bne cr0 */ |