[PATCH 4.8 023/140] parisc: Fix kernel memory layout regarding position of __gp

From	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups	linux.kernel
Subject	[PATCH 4.8 023/140] parisc: Fix kernel memory layout regarding position of __gp
Date	2016-10-26 15:40 +0200
Message-ID	<swwAV-4k7-3@gated-at.bofh.it> (permalink)
References	<swvvb-3zX-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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4.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Helge Deller <deller@gmx.de>

commit f8850abb7ba68229838014b3409460e576751c6d upstream.

Architecturally we need to keep __gp below 0x1000000.

But because of ftrace and tracepoint support, the RO_DATA_SECTION now gets much
bigger than it was before. By moving the linkage tables before RO_DATA_SECTION
we can avoid that __gp gets positioned at a too high address.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/parisc/kernel/vmlinux.lds.S |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/arch/parisc/kernel/vmlinux.lds.S
@@ -89,8 +89,9 @@ SECTIONS
 	/* Start of data section */
 	_sdata = .;
 
-	RO_DATA_SECTION(8)
-
+	/* Architecturally we need to keep __gp below 0x1000000 and thus
+	 * in front of RO_DATA_SECTION() which stores lots of tracepoint
+	 * and ftrace symbols. */
 #ifdef CONFIG_64BIT
 	. = ALIGN(16);
 	/* Linkage tables */
@@ -105,6 +106,8 @@ SECTIONS
 	}
 #endif
 
+	RO_DATA_SECTION(8)
+
 	/* unwind info */
 	.PARISC.unwind : {
 		__start___unwind = .;

Thread

[PATCH 4.8 000/140] 4.8.5-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 058/140] zfcp: fix payload trace length for SAN request&response Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 043/140] powerpc/mm: Update FORCE_MAX_ZONEORDER range to allow hugetlb w/4K Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 065/140] [media] mb86a20s: fix demod settings Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 076/140] NFSD: fix corruption in notifier registration Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 009/140] ath10k: fix copy engine 5 destination ring stuck Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 044/140] powerpc/64: Fix incorrect return value from __copy_tofrom_user Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 042/140] powerpc/powernv: Use CPU-endian PEST in pnv_pci_dump_p7ioc_diag_data() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 045/140] powerpc/pseries: Fix stack corruption in htpe code Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 064/140] [media] mb86a20s: fix the locking logic Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 007/140] spi: spidev_test: Fix buffer overflow in unescape() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 073/140] Input: elantech - force needed quirks on Fujitsu H760 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 050/140] zfcp: fix fc_host port_type with NPIV Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 049/140] ubi: Deal with interrupted erasures in WL Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 040/140] powerpc/eeh: Null check uses of eeh_pe_bus_get Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 052/140] zfcp: close window with unblocked rport during rport gone Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 038/140] powerpc/vdso64: Use double word compare on pointers Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 047/140] IB/srp: Fix infinite loop when FMR sg[0].offset != 0 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 060/140] scsi: zfcp: spin_lock_irqsave() is not nestable Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 071/140] MIPS: ptrace: Fix regs_return_value for kernel context Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 054/140] zfcp: restore: Dont use 0 to indicate invalid LUN in rec trace Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:30 +0200
  [PATCH 4.8 019/140] cpufreq: intel_pstate: Fix unsafe HWP MSR access Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 023/140] parisc: Fix kernel memory layout regarding position of __gp Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 018/140] cpufreq: skip invalid entries when searching the frequency Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 015/140] platform: dont return 0 from platform_get_irq[_byname]() on error Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 036/140] dm crypt: fix crash on exit Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 022/140] parisc: Fix self-detected CPU stall warnings on Mako machines Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 025/140] pstore/ramoops: fixup driver removal Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 021/140] parisc: Increase KERNEL_INITIAL_SIZE for 32-bit SMP kernels Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 030/140] perf intel-pt: Fix estimated timestamps for cycle-accurate mode Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 034/140] dm rq: take request_queue lock while clearing QUEUE_FLAG_STOPPED Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 017/140] cpufreq: conservative: Fix next frequency selection Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 005/140] clk: imx6: initialize GPU clocks Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 028/140] pstore/ram: Use memcpy_fromio() to save old buffer Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 031/140] perf intel-pt: Fix MTC timestamp calculation for large MTC periods Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  [PATCH 4.8 033/140] dm: return correct error code in dm_resume()s retry loop Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-10-26 15:40 +0200
  Re: [PATCH 4.8 000/140] 4.8.5-stable review Shuah Khan <shuah.kh@samsung.com> - 2016-10-26 20:50 +0200
  Re: [PATCH 4.8 000/140] 4.8.5-stable review Guenter Roeck <linux@roeck-us.net> - 2016-10-26 23:50 +0200

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