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| author | Helge Deller <deller@gmx.de> | 2016-04-13 22:27:22 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2016-04-14 17:47:19 +0200 |
| commit | 366dd4ea9d5f0eb78fdf4982d76506f99480ec0a (patch) | |
| tree | a1540803a33b13685a1fe2e3fa8af13bc2e7f018 /arch/parisc/kernel/head.S | |
| parent | Linux 4.5 (diff) | |
| download | linux-366dd4ea9d5f0eb78fdf4982d76506f99480ec0a.tar.xz linux-366dd4ea9d5f0eb78fdf4982d76506f99480ec0a.zip | |
parisc: Fix ftrace function tracer
Fix the FTRACE function tracer for 32- and 64-bit kernel.
The former code was horribly broken.
Reimplement most coding in assembly and utilize optimizations, e.g. put
mcount() and ftrace_stub() into one L1 cacheline.
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to '')
| -rw-r--r-- | arch/parisc/kernel/head.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S index 75aa0db9f69e..bbbe360b458f 100644 --- a/arch/parisc/kernel/head.S +++ b/arch/parisc/kernel/head.S @@ -129,6 +129,15 @@ $pgt_fill_loop: /* And the stack pointer too */ ldo THREAD_SZ_ALGN(%r6),%sp +#if defined(CONFIG_64BIT) && defined(CONFIG_FUNCTION_TRACER) + .import _mcount,data + /* initialize mcount FPTR */ + /* Get the global data pointer */ + loadgp + load32 PA(_mcount), %r10 + std %dp,0x18(%r10) +#endif + #ifdef CONFIG_SMP /* Set the smp rendezvous address into page zero. ** It would be safer to do this in init_smp_config() but |