Re: [PATCH][RFC] parisc: Build kernel without -ffunction-sections

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This probably works but the compiler will use long calls when a relative branch can't reach
the stub table.  So, performance will degrade in large modules.

On 2018-04-20 5:13 PM, Helge Deller wrote:
As suggested by Nick Piggin it seems we can drop the -ffunction-sections
compile flag, now that the kernel uses thin archives.

Suggested-by: Nicholas Piggin <npiggin@xxxxxxxxx>
Signed-off-by: Helge Deller <deller@xxxxxx>

diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 34ac503e28ad..3555cd1c0193 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -65,10 +65,6 @@ endif
  # kernel.
  cflags-y	+= -mdisable-fpregs
-# Without this, "ld -r" results in .text sections that are too big
-# (> 0x40000) for branches to reach stubs.
-cflags-y	+= -ffunction-sections
-
  # Use long jumps instead of long branches (needed if your linker fails to
  # link a too big vmlinux executable). Not enabled for building modules.
  ifdef CONFIG_MLONGCALLS
--
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Dave

--
John David Anglin  dave.anglin@xxxxxxxx

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