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authorDavid S. Miller <davem@davemloft.net>2008-07-18 02:43:55 -0400
committerDavid S. Miller <davem@davemloft.net>2008-07-18 02:44:53 -0400
commitf7fe93344fd3f4ccd406a35f751a61b77f94b0fc (patch)
tree2d164e040f6acde923147a53e5c92fa0ca0cf0ec /arch/sparc64/mm
parentd172ad18f9914f70c761a6cad470efc986d5e07e (diff)
sparc64: Remove 4MB and 512K base page size options.
Adrian Bunk reported that enabling 4MB page size breaks the build. The problem is that MAX_ORDER combined with the page shift exceeds the SECTION_SIZE_BITS we use in asm-sparc64/sparsemem.h There are several ways I suppose we could work around this. For one we could define a CONFIG_FORCE_MAX_ZONEORDER to decrease MAX_ORDER in these higher page size cases. But I also know that these page size cases are broken wrt. TLB miss handling especially on pre-hypervisor systems, and there isn't an easy way to fix that. These options were meant to be fun experimental hacks anyways, and only 8K and 64K make any sense to support. So remove 512K and 4M base page size support. Of course, we still support these page sizes for huge pages. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/mm')
-rw-r--r--arch/sparc64/mm/tsb.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/sparc64/mm/tsb.c b/arch/sparc64/mm/tsb.c
index fe70c8a557b5..3547937b17a2 100644
--- a/arch/sparc64/mm/tsb.c
+++ b/arch/sparc64/mm/tsb.c
@@ -96,12 +96,6 @@ void flush_tsb_user(struct mmu_gather *mp)
96#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) 96#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
97#define HV_PGSZ_IDX_BASE HV_PGSZ_IDX_64K 97#define HV_PGSZ_IDX_BASE HV_PGSZ_IDX_64K
98#define HV_PGSZ_MASK_BASE HV_PGSZ_MASK_64K 98#define HV_PGSZ_MASK_BASE HV_PGSZ_MASK_64K
99#elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
100#define HV_PGSZ_IDX_BASE HV_PGSZ_IDX_512K
101#define HV_PGSZ_MASK_BASE HV_PGSZ_MASK_512K
102#elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
103#define HV_PGSZ_IDX_BASE HV_PGSZ_IDX_4MB
104#define HV_PGSZ_MASK_BASE HV_PGSZ_MASK_4MB
105#else 99#else
106#error Broken base page size setting... 100#error Broken base page size setting...
107#endif 101#endif