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Message-ID: <20110117195215.GA2708@fedora14-r610.oslab.blr.amer.dell.com> Date: Mon, 17 Jan 2011 11:28:48 -0800 From: <Narendra_K@...l.com> To: <sfr@...b.auug.org.au> CC: <jbarnes@...tuousgeek.org>, <lenb@...nel.org>, <linux-kernel@...r.kernel.org>, <linux-next@...r.kernel.org>, <Matt_Domsch@...l.com>, <Charles_Rose@...l.com>, <Surya_Prabhakar@...l.com> Subject: Re: [PATCH] Fix build failure when CONFIG_NLS is set to 'm' by allmodconfig On Sat, Jan 15, 2011 at 02:39:49AM +0530, Stephen Rothwell wrote: > Hi Narendra, > > On Fri, 14 Jan 2011 20:52:42 +0530 <Narendra_K@...l.com> wrote: > > > > This patch addresses the build failure described in this thread by > > compiling fs/nls/nls_base.c always into vmlinux, thus making the base > > nls functions available always. > > Even on platforms that don't support ACPI or DMI ... > > > From: Narendra K <narendra_k@...l.com> > > Subject: [PATCH] Fix build failure when CONFIG_NLS is set to 'm' by allmodconfig > > > > This patch fixes the following build breakage introduced by the patch > > PCI:export ACPI _DSM provided firmware instance number and string to sysfs. > > (previously commit a6247cd4be20cb5439db5cb7b0b6cc67fdc8e2a2). > > > > http://marc.info/?l=linux-pci&m=129313294112736&w=1 > > > > drivers/built-in.o: In function `T.647': > > pci-label.c:(.text+0x28514): undefined reference to `utf16s_to_utf8s' > > > > This happens because 'make allmodconfig' sets CONFIG_NLS=m and makes > > 'utf16s_to_utf8s` unavailable to drivers/pci/pci-label.o which is built > > into vmlinux. > > > > This is fixed by making fs/nls/nls_base.c always compile as part of > > vmlinux thus making the base nls functions available always. > > +++ b/fs/nls/Makefile > > @@ -2,7 +2,7 @@ > > # Makefile for native language support > > # > > > > -obj-$(CONFIG_NLS) += nls_base.o > > +obj-y += nls_base.o > > You should really restrict this to CONFIG_ACPI || CONFIG_DMI || > CONFIG_NLS ... maybe create a CONFIG_NLS_BASE that is selected by ACPI, > DMI and NLS? Hi Stephen, Thank you for the suggestions. I agree with your suggestion that we should compile nls_base.o conditionally, only when ACPI || DMI || NLS. I have introduced a bew config option CONFIG_NLS_BASE and made ACPI, DMI and NLS select it. V1 -> V2: 1. Conditionally compile fs/nls/nls_base.c by introducing a new config option CONFIG_NLS_BASE, which is selected by (ACPI || DMI || NLS). Behavior of the rest of the files under fs/nls is not changed. From: Narendra K <narendra_k@...l.com> Subject: [PATCH V2] Fix build failure when CONFIG_NLS is set to 'm' by allmodconfig This patch fixes the following build breakage introduced by the patch PCI:export ACPI _DSM provided firmware instance number and string to sysfs. (previously commit a6247cd4be20cb5439db5cb7b0b6cc67fdc8e2a2). http://marc.info/?l=linux-pci&m=129313294112736&w=1 drivers/built-in.o: In function `T.647': pci-label.c:(.text+0x28514): undefined reference to `utf16s_to_utf8s' This happens because 'make allmodconfig' sets CONFIG_NLS=m and makes 'utf16s_to_utf8s` unavailable to drivers/pci/pci-label.o which is built into vmlinux. This is fixed by making fs/nls/nls_base.c compile conditionally into vmlinux by introducing a new config option CONFIG_NLS_BASE which is selected by (ACPI || DMI || NLS). This makes Signed-off-by: Narendra K <narendra_k@...l.com> --- fs/Makefile | 2 +- fs/nls/Kconfig | 14 ++++++++++++++ fs/nls/Makefile | 2 +- 3 files changed, 16 insertions(+), 2 deletions(-) diff --git a/fs/Makefile b/fs/Makefile index a7f7cef..1e78b9b 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -86,7 +86,7 @@ obj-$(CONFIG_NFS_FS) += nfs/ obj-$(CONFIG_EXPORTFS) += exportfs/ obj-$(CONFIG_NFSD) += nfsd/ obj-$(CONFIG_LOCKD) += lockd/ -obj-$(CONFIG_NLS) += nls/ +obj-y += nls/ obj-$(CONFIG_SYSV_FS) += sysv/ obj-$(CONFIG_CIFS) += cifs/ obj-$(CONFIG_NCP_FS) += ncpfs/ diff --git a/fs/nls/Kconfig b/fs/nls/Kconfig index a39edc4..2fb92e5 100644 --- a/fs/nls/Kconfig +++ b/fs/nls/Kconfig @@ -4,6 +4,7 @@ menuconfig NLS tristate "Native language support" + select NLS_BASE ---help--- The base Native Language Support. A number of filesystems depend on it (e.g. FAT, JOLIET, NT, BEOS filesystems), as well @@ -17,6 +18,19 @@ menuconfig NLS if NLS +config NLS_BASE + bool "Base NLS functions" + depends on ACPI || DMI + default y + ---help--- + The base NLS support functions which handle unicode traslations. + + If unsure, say Y. + + This config option is selected by ACPI && DMI && NLS as the + functions defined here are needed in vmlinux and if built as + module cause build issues. + config NLS_DEFAULT string "Default NLS Option" default "iso8859-1" diff --git a/fs/nls/Makefile b/fs/nls/Makefile index f499dd7..dde741f 100644 --- a/fs/nls/Makefile +++ b/fs/nls/Makefile @@ -2,7 +2,7 @@ # Makefile for native language support # -obj-$(CONFIG_NLS) += nls_base.o +obj-$(CONFIG_NLS_BASE) += nls_base.o obj-$(CONFIG_NLS_CODEPAGE_437) += nls_cp437.o obj-$(CONFIG_NLS_CODEPAGE_737) += nls_cp737.o -- 1.7.3.1 With regards, Narendra K-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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