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Groups > linux.kernel > #1537343

[PATCHv5 05/11] mm: Introduce lm_alias

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Certain architectures may have the kernel image mapped separately to
alias the linear map. Introduce a macro lm_alias to translate a kernel
image symbol into its linear alias. This is used in part with work to
add CONFIG_DEBUG_VIRTUAL support for arm64.

Signed-off-by: Laura Abbott <labbott@redhat.com>
---
v5: Split off from the arm64 conversion to __pa_symbol
---
 include/linux/mm.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index a92c8d7..88556b8 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -76,6 +76,10 @@ extern int mmap_rnd_compat_bits __read_mostly;
 #define page_to_virt(x)	__va(PFN_PHYS(page_to_pfn(x)))
 #endif
 
+#ifndef lm_alias
+#define lm_alias(x)	__va(__pa_symbol(x))
+#endif
+
 /*
  * To prevent common memory management code establishing
  * a zero page mapping on a read fault.
-- 
2.7.4

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[PATCHv5 00/11] CONFIG_DEBUG_VIRTUAL for arm64 Laura Abbott <labbott@redhat.com> - 2016-12-07 01:00 +0100
  [PATCHv5 07/11] drivers: firmware: psci: Use __pa_symbol for kernel symbol Laura Abbott <labbott@redhat.com> - 2016-12-07 01:00 +0100
  [PATCHv5 11/11] arm64: Add support for CONFIG_DEBUG_VIRTUAL Laura Abbott <labbott@redhat.com> - 2016-12-07 01:00 +0100
  [PATCHv5 01/11] lib/Kconfig.debug: Add ARCH_HAS_DEBUG_VIRTUAL Laura Abbott <labbott@redhat.com> - 2016-12-07 01:00 +0100
  [PATCHv5 05/11] mm: Introduce lm_alias Laura Abbott <labbott@redhat.com> - 2016-12-07 01:00 +0100
  [PATCHv5 04/11] arm64: Add cast for virt_to_pfn Laura Abbott <labbott@redhat.com> - 2016-12-07 01:00 +0100
  [PATCHv5 06/11] arm64: Use __pa_symbol for kernel symbols Laura Abbott <labbott@redhat.com> - 2016-12-07 01:00 +0100
  [PATCHv5 09/11] mm/kasan: Switch to using __pa_symbol and lm_alias Laura Abbott <labbott@redhat.com> - 2016-12-07 01:00 +0100
  [PATCH v2 3/4] ARM: Add support for CONFIG_DEBUG_VIRTUAL Florian Fainelli <f.fainelli@gmail.com> - 2016-12-08 20:10 +0100
  [PATCH v2 0/4] ARM: Add support for CONFIG_DEBUG_VIRTUAL Florian Fainelli <f.fainelli@gmail.com> - 2016-12-08 20:10 +0100
    [PATCH v2 1/4] mtd: lart: Rename partition defines to be prefixed with PART_ Florian Fainelli <f.fainelli@gmail.com> - 2016-12-08 20:10 +0100
    [PATCH v2 2/4] ARM: Define KERNEL_START and KERNEL_END Florian Fainelli <f.fainelli@gmail.com> - 2016-12-08 20:10 +0100
    [PATCH v3 2/4] ARM: Define KERNEL_START and KERNEL_END Florian Fainelli <f.fainelli@gmail.com> - 2016-12-10 00:40 +0100
    [PATCH v3 1/4] mtd: lart: Rename partition defines to be prefixed with PART_ Florian Fainelli <f.fainelli@gmail.com> - 2016-12-10 00:40 +0100
    [PATCH v3 3/4] ARM: Add support for CONFIG_DEBUG_VIRTUAL Florian Fainelli <f.fainelli@gmail.com> - 2016-12-10 00:40 +0100
    [PATCH v3 0/4] ARM: Add support for CONFIG_DEBUG_VIRTUAL Florian Fainelli <f.fainelli@gmail.com> - 2016-12-10 00:40 +0100

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