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| author | Felix Fietkau <nbd@nbd.name> | 2017-10-18 22:46:29 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2017-10-18 22:59:05 +0200 |
| commit | 7c42f15c2406481784d654d99244539d71522582 (patch) | |
| tree | 82e1447bc5c28214303d9a89c6fa7a2f2a7012cf /target/linux/generic/hack-4.9/220-gc_sections.patch | |
| parent | 36d2884d553aa4cc98b1df5ed43a16ab336dd660 (diff) | |
| download | upstream-7c42f15c2406481784d654d99244539d71522582.tar.gz upstream-7c42f15c2406481784d654d99244539d71522582.tar.bz2 upstream-7c42f15c2406481784d654d99244539d71522582.zip | |
kernel: fix ftrace support on 4.9
When porting the kernel patches from 4.4 to 4.9, they were missing a
small chunk that ensures that ftrace sections are kept in the vmlinux
image, even when linked with --gc-sections
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'target/linux/generic/hack-4.9/220-gc_sections.patch')
| -rw-r--r-- | target/linux/generic/hack-4.9/220-gc_sections.patch | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/generic/hack-4.9/220-gc_sections.patch b/target/linux/generic/hack-4.9/220-gc_sections.patch index 428fcb6501..eda8bb8b2b 100644 --- a/target/linux/generic/hack-4.9/220-gc_sections.patch +++ b/target/linux/generic/hack-4.9/220-gc_sections.patch @@ -201,6 +201,33 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org> --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h +@@ -105,7 +105,7 @@ + #ifdef CONFIG_FTRACE_MCOUNT_RECORD + #define MCOUNT_REC() . = ALIGN(8); \ + VMLINUX_SYMBOL(__start_mcount_loc) = .; \ +- *(__mcount_loc) \ ++ KEEP(*(__mcount_loc)) \ + VMLINUX_SYMBOL(__stop_mcount_loc) = .; + #else + #define MCOUNT_REC() +@@ -113,7 +113,7 @@ + + #ifdef CONFIG_TRACE_BRANCH_PROFILING + #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ +- *(_ftrace_annotated_branch) \ ++ KEEP(*(_ftrace_annotated_branch)) \ + VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; + #else + #define LIKELY_PROFILE() +@@ -121,7 +121,7 @@ + + #ifdef CONFIG_PROFILE_ALL_BRANCHES + #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ +- *(_ftrace_branch) \ ++ KEEP(*(_ftrace_branch)) \ + VMLINUX_SYMBOL(__stop_branch_profile) = .; + #else + #define BRANCH_PROFILE() @@ -130,7 +130,7 @@ #ifdef CONFIG_KPROBES #define KPROBE_BLACKLIST() . = ALIGN(8); \ |