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[v5,3/5] build: Alloc space for sched list in the link file

Message ID 1452782954-56016-4-git-send-email-jonathan.creekmore@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Jonathan Creekmore Jan. 14, 2016, 2:49 p.m. UTC 
Creates a section to contain scheduler entry pointers that are gathered
together into an array. This will allow, in a follow-on patch, scheduler
entries to be automatically gathered together into the array for
automatic parsing.

CC: Ian Campbell <ian.campbell@citrix.com>
CC: Stefano Stabellini <stefano.stabellini@citrix.com>
CC: Keir Fraser <keir@xen.org>
CC: Jan Beulich <jbeulich@suse.com>
CC: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jonathan Creekmore <jonathan.creekmore@gmail.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Doug Goldstein <cardoe@cardoe.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

---
Changed since v4:
  * Remove defensive check for schedulers since the credit scheduler
    must always be present

Changed since v3:
  * Add defensive check for schedulers in the linker

Changed since v1:
  * rename the __start and __end symbols to better match
    the rest of the file
---
 xen/arch/arm/xen.lds.S | 4 ++++
 xen/arch/x86/xen.lds.S | 4 ++++
 2 files changed, 8 insertions(+)
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Patch

diff --git a/xen/arch/arm/xen.lds.S b/xen/arch/arm/xen.lds.S
index 0488f37..f501a2f 100644
--- a/xen/arch/arm/xen.lds.S
+++ b/xen/arch/arm/xen.lds.S
@@ -57,6 +57,10 @@  SECTIONS
        . = ALIGN(PAGE_SIZE);
        *(.data.page_aligned)
        *(.data)
+       . = ALIGN(8);
+       __start_schedulers_array = .;
+       *(.data.schedulers)
+       __end_schedulers_array = .;
        *(.data.rel)
        *(.data.rel.*)
        CONSTRUCTORS
diff --git a/xen/arch/x86/xen.lds.S b/xen/arch/x86/xen.lds.S
index e18e08f..c1ce027 100644
--- a/xen/arch/x86/xen.lds.S
+++ b/xen/arch/x86/xen.lds.S
@@ -80,6 +80,10 @@  SECTIONS
        __stop___pre_ex_table = .;
 
        *(.data.read_mostly)
+       . = ALIGN(8);
+       __start_schedulers_array = .;
+       *(.data.schedulers)
+       __end_schedulers_array = .;
        *(.data.rel.ro)
        *(.data.rel.ro.*)
   } :text