diff options
| author | Vasily Gorbik <gor@linux.vnet.ibm.com> | 2018-01-17 14:51:57 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-01-23 07:36:54 +0100 |
| commit | 47d67facb057b15d29d65170df06b102a3ddd34e (patch) | |
| tree | a064e5beb87727dc8cf2d9d79e9aa9622856e127 /arch/s390 | |
| parent | 6dd0d2d22aa363fec075cb2577ba273ac8462e94 (diff) | |
s390/decompressor: discard __ksymtab and .eh_frame sections
__ksymtab sections created for exported symbols are not needed
during the decompressor phase and could be discarded to save the memory.
The source of those exports is ebcdic.o, which is linked into both
vmlinux and boot/compressed/vmlinux.
.eh_frame section is also unused and could be discarded from
boot/compressed/vmlinux. The same has been done for vmlinux in:
"s390/kernel: emit CFI data in .debug_frame and discard .eh_frame
sections".
Signed-off-by: Vasily Gorbik <gor@linux.vnet.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/boot/compressed/Makefile | 1 | ||||
| -rw-r--r-- | arch/s390/boot/compressed/vmlinux.lds.S | 6 |
2 files changed, 7 insertions, 0 deletions
diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index 29e3dc99b916..26d6a94f40f6 100644 --- a/arch/s390/boot/compressed/Makefile +++ b/arch/s390/boot/compressed/Makefile @@ -14,6 +14,7 @@ targets += misc.o piggy.o sizes.h head.o KBUILD_CFLAGS := -m64 -D__KERNEL__ -O2 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks -msoft-float +KBUILD_CFLAGS += -fno-asynchronous-unwind-tables KBUILD_CFLAGS += $(call cc-option,-mpacked-stack) KBUILD_CFLAGS += $(call cc-option,-ffreestanding) diff --git a/arch/s390/boot/compressed/vmlinux.lds.S b/arch/s390/boot/compressed/vmlinux.lds.S index 0c42535ec696..8150132b144f 100644 --- a/arch/s390/boot/compressed/vmlinux.lds.S +++ b/arch/s390/boot/compressed/vmlinux.lds.S @@ -48,4 +48,10 @@ SECTIONS _ebss = .; } _end = .; + + /* Sections to be discarded */ + /DISCARD/ : { + *(.eh_frame) + *(*__ksymtab*) + } } |