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authorPeter Oberparleiter <oberpar@linux.ibm.com>2018-09-13 13:00:00 +0200
committerStephen Rothwell <sfr@canb.auug.org.au>2018-10-12 08:55:29 +1100
commit52c8ee5bad8f33d02c567f6609f43d69303fc48d (patch)
tree9a89e266e294bc1ae01a418d33bf3920e41712ea
parent8dcf86caa1e3daf4a6ccf38e97f4f752b411f829 (diff)
downloadlinux-52c8ee5bad8f33d02c567f6609f43d69303fc48d.tar.bz2
vmlinux.lds.h: Fix linker warnings about orphan .LPBX sections
Enabling both CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y and CONFIG_GCOV_PROFILE_ALL=y results in linker warnings: warning: orphan section `.data..LPBX1' being placed in section `.data..LPBX1'. LD_DEAD_CODE_DATA_ELIMINATION adds compiler flag -fdata-sections. This option causes GCC to create separate data sections for data objects, including those generated by GCC internally for gcov profiling. The names of these objects start with a dot (.LPBX0, .LPBX1), resulting in section names starting with 'data..'. As section names starting with 'data..' are used for specific purposes in the Linux kernel, the linker script does not automatically include them in the output data section, resulting in the "orphan section" linker warnings. Fix this by specifically including sections named "data..LPBX*" in the data section. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Tested-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
-rw-r--r--include/asm-generic/vmlinux.lds.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index b4d74b1c1e1d..d7701d466b60 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -68,7 +68,7 @@
*/
#ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
#define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
-#define DATA_MAIN .data .data.[0-9a-zA-Z_]*
+#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
#define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
#define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
#define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*