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[RFC,10/11] powerpc/prom_init: Move __prombss to it's own section and store it in .bss

Message ID 20180531043349.24783-11-benh@kernel.crashing.org (mailing list archive)
State Superseded
Headers show
Series [RFC,01/11] powerpc/prom_init: Make of_workarounds static | expand

Commit Message

Benjamin Herrenschmidt May 31, 2018, 4:33 a.m. UTC 
This makes __prombss its own section, and for now store
it in .bss.

This will give us the ability later to store it elsewhere
and/or free it after boot (it's about 8KB).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/kernel/prom_init.c   | 2 +-
 arch/powerpc/kernel/vmlinux.lds.S | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index f54177a84dbc..8c39f6bb8ee3 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -49,7 +49,7 @@ 
 #include <linux/linux_logo.h>
 
 /* All of prom_init bss lives here */
-#define __prombss __initdata
+#define __prombss __section(.bss.prominit)
 
 /*
  * Eventually bump that one up
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index b8d82678f8b4..c3254d978e34 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -4,6 +4,9 @@ 
 #else
 #define PROVIDE32(x)	PROVIDE(x)
 #endif
+
+#define BSS_FIRST_SECTIONS *(.bss.prominit)
+
 #include <asm/page.h>
 #include <asm-generic/vmlinux.lds.h>
 #include <asm/cache.h>