path: root/arch/metag
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authorJames Hogan <james.hogan@imgtec.com>2014-05-01 12:31:14 +0100
committerJames Hogan <james.hogan@imgtec.com>2014-05-15 00:30:32 +0100
commitc70458f50cd4271410aa75011f56ffabc0e2d34a (patch)
tree797efbbd36e4331f1fd5a51adc449ef0fadf3ef9 /arch/metag
parent042d27acb64924a0e8a43e972485913a32407beb (diff)
metag: Remove _STK_LIM_MAX override
Meta overrode _STK_LIM_MAX (the default RLIMIT_STACK hard limit) to 256MB, apparently in an attempt to prevent setup_arg_pages's STACK_GROWSUP code from choosing the maximum stack size of 1GB, which is far too large for Meta's limited virtual address space and hits a BUG_ON (stack_top is usually 0x3ffff000). However the commit "metag: Reduce maximum stack size to 256MB" reduces the absolute stack size limit to a safe value for metag. This allows the default _STK_LIM_MAX override to be removed, bringing the default behaviour in line with all other architectures. Parisc in particular recently removed their override of _STK_LIMT_MAX in commit e0d8898d76a7 (parisc: remove _STK_LIM_MAX override) since it subtly affects stack allocation semantics in userland. Meta's uapi/asm/resource.h can now be removed and switch to using generic-y. Suggested-by: Helge Deller <deller@gmx.de> Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: linux-metag@vger.kernel.org Cc: John David Anglin <dave.anglin@bell.net>
Diffstat (limited to 'arch/metag')
2 files changed, 1 insertions, 8 deletions
diff --git a/arch/metag/include/uapi/asm/Kbuild b/arch/metag/include/uapi/asm/Kbuild
index 84e09feb4d5..ab78be2b6eb 100644
--- a/arch/metag/include/uapi/asm/Kbuild
+++ b/arch/metag/include/uapi/asm/Kbuild
@@ -4,11 +4,11 @@ include include/uapi/asm-generic/Kbuild.asm
header-y += byteorder.h
header-y += ech.h
header-y += ptrace.h
-header-y += resource.h
header-y += sigcontext.h
header-y += siginfo.h
header-y += swab.h
header-y += unistd.h
generic-y += mman.h
+generic-y += resource.h
generic-y += setup.h
diff --git a/arch/metag/include/uapi/asm/resource.h b/arch/metag/include/uapi/asm/resource.h
deleted file mode 100644
index 526d23cc305..00000000000
--- a/arch/metag/include/uapi/asm/resource.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#define _STK_LIM_MAX (1 << 28)
-#include <asm-generic/resource.h>
-#endif /* _UAPI_METAG_RESOURCE_H */