powerpc: Link warning for orphan sections
authorNicholas Piggin <npiggin@gmail.com>
Thu, 11 May 2017 17:40:40 +0000 (03:40 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 30 May 2017 04:59:51 +0000 (14:59 +1000)
commit83a092cf95f28696ddc36c8add0cf03ac034897f
tree61b7aab91d026e0722f1d347c9931d194cf3aaac
parentc494adefef9fcd0de172132e20f102d44c62fa2f
powerpc: Link warning for orphan sections

Add --orphan-handling=warn to final link flags. This ensures we can
handle all sections explicitly. This would have caught subtle breakage
such as 7de3b27bac47da9de08409df1d69664acbb72197 at build-time.

Also bring existing orphan sections into the fold:
- .text.hot and .text.unlikely are compiler generated sections.
- .sdata2, .dynsbss, .plt are used by PPC32
- We previously did not specify DWARF_DEBUG or STABS_DEBUG
- DWARF_DEBUG did not include all DWARF sections that can be emitted
- A number of sections are unused and can be discarded.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/Makefile
arch/powerpc/kernel/vmlinux.lds.S
include/asm-generic/vmlinux.lds.h