diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/Kconfig | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/nops.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 6 |
3 files changed, 6 insertions, 3 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index beea3ccebb5..7f418bbc261 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -9,6 +9,7 @@ config OPROFILE depends on TRACING_SUPPORT select TRACING select RING_BUFFER + select RING_BUFFER_ALLOW_SWAP help OProfile is a profiling system capable of profiling the whole system, include the kernel, kernel modules, libraries, diff --git a/arch/x86/include/asm/nops.h b/arch/x86/include/asm/nops.h index ad2668ee1aa..6d8723a766c 100644 --- a/arch/x86/include/asm/nops.h +++ b/arch/x86/include/asm/nops.h @@ -65,6 +65,8 @@ 6: osp nopl 0x00(%eax,%eax,1) 7: nopl 0x00000000(%eax) 8: nopl 0x00000000(%eax,%eax,1) + Note: All the above are assumed to be a single instruction. + There is kernel code that depends on this. */ #define P6_NOP1 GENERIC_NOP1 #define P6_NOP2 ".byte 0x66,0x90\n" diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index c251be74510..d59fe323807 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -146,7 +146,7 @@ ENTRY(ftrace_graph_caller) END(ftrace_graph_caller) GLOBAL(return_to_handler) - subq $80, %rsp + subq $24, %rsp /* Save the return values */ movq %rax, (%rsp) @@ -155,10 +155,10 @@ GLOBAL(return_to_handler) call ftrace_return_to_handler - movq %rax, 72(%rsp) + movq %rax, 16(%rsp) movq 8(%rsp), %rdx movq (%rsp), %rax - addq $72, %rsp + addq $16, %rsp retq #endif |