Greg Kroah-Hartman wrote:
4.16-stable review patch. If anyone has any objections, please let me know.
Please drop this and the next patch since these depend on commit e145242ea0df6, which is not in v4.16.
- Naveen
From: "Naveen N. Rao" naveen.n.rao@linux.vnet.ibm.com
[ Upstream commit 0b7758aaf6543b9a10c8671db559e9d374a3fd95 ]
On powerpc64 ABIv1, we are enabling syscall tracing for only ~20 syscalls. This is due to commit e145242ea0df6 ("syscalls/core, syscalls/x86: Clean up syscall stub naming convention") which has changed the syscall entry wrapper prefix from "SyS" to "__se_sys".
Update the logic for ABIv1 to not just skip the initial dot, but also the "__se_sys" prefix.
Fixes: commit e145242ea0df6 ("syscalls/core, syscalls/x86: Clean up syscall stub naming convention") Reported-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Naveen N. Rao naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
arch/powerpc/include/asm/ftrace.h | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-)
--- a/arch/powerpc/include/asm/ftrace.h +++ b/arch/powerpc/include/asm/ftrace.h @@ -73,13 +73,9 @@ struct dyn_arch_ftrace { #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) {
- /*
* Compare the symbol name with the system call name. Skip the .sys or .SyS* prefix from the symbol name and the sys prefix from the system call name and* just match the rest. This is only needed on ppc64 since symbol names on* 32bit do not start with a period so the generic function will work.*/- return !strcmp(sym + 4, name + 3);
- /* We need to skip past the initial dot, and the __se_sys alias */
- return !strcmp(sym + 1, name) ||
(!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name));} #endif #endif /* CONFIG_FTRACE_SYSCALLS && !__ASSEMBLY__ */