diff options
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.21/31-use_kbuild.h.patch')
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.21/31-use_kbuild.h.patch | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.21/31-use_kbuild.h.patch b/target/linux/generic-2.6/patches-2.6.21/31-use_kbuild.h.patch new file mode 100644 index 0000000000..45c753b55b --- /dev/null +++ b/target/linux/generic-2.6/patches-2.6.21/31-use_kbuild.h.patch @@ -0,0 +1,21 @@ +[MIPS] Fix computation of {PGD,PMD,PTE}_T_LOG2. + +For the generation of asm-offset.h to work these need to be evaulatable +by gcc as a constant expression. This issue did exist for a while but +didn't bite because they're only in asm-offset.h for debugging purposes. + +--- a/include/asm-mips/pgtable.h ++++ b/include/asm-mips/pgtable.h +@@ -168,9 +168,9 @@ static inline void pte_clear(struct mm_s + #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) + #endif + +-#define PGD_T_LOG2 ffz(~sizeof(pgd_t)) +-#define PMD_T_LOG2 ffz(~sizeof(pmd_t)) +-#define PTE_T_LOG2 ffz(~sizeof(pte_t)) ++#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1) ++#define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1) ++#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1) + + extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; + |