diff options
authorMark Salter <>2014-04-05 14:25:49 (GMT)
committerChanho Park <>2014-04-16 12:36:52 (GMT)
commit947f2b1c543d62cfc876c5b1ce8e13d08181adf8 (patch)
parent840caf3b6e0c0e741ebe973588ea5c36558d7e38 (diff)
arm64: fix !CONFIG_COMPAT build failures
Recent arm64 builds using CONFIG_ARM64_64K_PAGES are failing with: arch/arm64/kernel/perf_regs.c: In function ‘perf_reg_abi’: arch/arm64/kernel/perf_regs.c:41:2: error: implicit declaration of function ‘is_compat_thread’ arch/arm64/kernel/perf_event.c:1398:2: error: unknown type name ‘compat_uptr_t’ This is due to some recent arm64 perf commits with compat support: commit 23c7d70d55c6d9: ARM64: perf: add support for frame pointer unwinding in compat mode commit 2ee0d7fd36a3f8: ARM64: perf: add support for perf registers API Those patches make the arm64 kernel unbuildable if CONFIG_COMPAT is not defined and CONFIG_ARM64_64K_PAGES depends on !CONFIG_COMPAT. This patch allows the arm64 kernel to build with and without CONFIG_COMPAT. Signed-off-by: Mark Salter <> Signed-off-by: Catalin Marinas <>
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index e868c72..baf5afb 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -1386,6 +1386,7 @@ user_backtrace(struct frame_tail __user *tail,
return buftail.fp;
* The registers we're interested in are at the end of the variable
* length saved register structure. The fp points at the end of this
@@ -1430,6 +1431,7 @@ compat_user_backtrace(struct compat_frame_tail __user *tail,
return (struct compat_frame_tail __user *)compat_ptr(buftail.fp) - 1;
+#endif /* CONFIG_COMPAT */
void perf_callchain_user(struct perf_callchain_entry *entry,
struct pt_regs *regs)
@@ -1451,6 +1453,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry,
tail && !((unsigned long)tail & 0xf))
tail = user_backtrace(tail, entry);
} else {
/* AARCH32 compat mode */
struct compat_frame_tail __user *tail;
@@ -1459,6 +1462,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry,
while ((entry->nr < PERF_MAX_STACK_DEPTH) &&
tail && !((unsigned long)tail & 0x3))
tail = compat_user_backtrace(tail, entry);
diff --git a/arch/arm64/kernel/perf_regs.c b/arch/arm64/kernel/perf_regs.c
index f2d6f0a..422ebd6 100644
--- a/arch/arm64/kernel/perf_regs.c
+++ b/arch/arm64/kernel/perf_regs.c
@@ -2,6 +2,8 @@
#include <linux/kernel.h>
#include <linux/perf_event.h>
#include <linux/bug.h>
+#include <asm/compat.h>
#include <asm/perf_regs.h>
#include <asm/ptrace.h>