The patch titled kmap-types: clean up and optimization has been added to the -mm tree. Its filename is kmap-types-clean-up-and-optimization.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: kmap-types: clean up and optimization From: "Jan Beulich" <JBeulich@xxxxxxxxxx> Several of the types aren't being used at all anymore - those can be deleted altogether. Others are used only by single components that can be assumed to be enabled everywhere, so those are made dependent upon CONFIG_* settings. Since this somewhat conflicts with the sequential gap markers used under __WITH_KM_FENCE, and since this can be simplified anyway, fold the enumerator definitions with the (modified accordingly) KMAP_D() macro always. The whole point of the reduction is that, at least on ix86, the number of kmap types can (depending on configuration) affect the amount of low memory, and thus unused types should be avoided if possible. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/arm/include/asm/kmap_types.h | 6 -- arch/powerpc/include/asm/kmap_types.h | 11 ---- arch/tile/include/asm/kmap_types.h | 5 -- include/asm-generic/kmap_types.h | 53 +++++++++++------------- 4 files changed, 26 insertions(+), 49 deletions(-) diff -puN arch/arm/include/asm/kmap_types.h~kmap-types-clean-up-and-optimization arch/arm/include/asm/kmap_types.h --- a/arch/arm/include/asm/kmap_types.h~kmap-types-clean-up-and-optimization +++ a/arch/arm/include/asm/kmap_types.h @@ -24,10 +24,4 @@ enum km_type { KM_TYPE_NR }; -#ifdef CONFIG_DEBUG_HIGHMEM -#define KM_NMI (-1) -#define KM_NMI_PTE (-1) -#define KM_IRQ_PTE (-1) -#endif - #endif diff -puN arch/powerpc/include/asm/kmap_types.h~kmap-types-clean-up-and-optimization arch/powerpc/include/asm/kmap_types.h --- a/arch/powerpc/include/asm/kmap_types.h~kmap-types-clean-up-and-optimization +++ a/arch/powerpc/include/asm/kmap_types.h @@ -30,16 +30,5 @@ enum km_type { KM_TYPE_NR }; -/* - * This is a temporary build fix that (so they say on lkml....) should no longer - * be required after 2.6.33, because of changes planned to the kmap code. - * Let's try to remove this cruft then. - */ -#ifdef CONFIG_DEBUG_HIGHMEM -#define KM_NMI (-1) -#define KM_NMI_PTE (-1) -#define KM_IRQ_PTE (-1) -#endif - #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_KMAP_TYPES_H */ diff -puN arch/tile/include/asm/kmap_types.h~kmap-types-clean-up-and-optimization arch/tile/include/asm/kmap_types.h --- a/arch/tile/include/asm/kmap_types.h~kmap-types-clean-up-and-optimization +++ a/arch/tile/include/asm/kmap_types.h @@ -45,12 +45,7 @@ enum { KM_IRQ1, KM_SOFTIRQ0, KM_SOFTIRQ1, - KM_SYNC_ICACHE, - KM_SYNC_DCACHE, KM_UML_USERCOPY, - KM_IRQ_PTE, - KM_NMI, - KM_NMI_PTE, KM_KDB }; diff -puN include/asm-generic/kmap_types.h~kmap-types-clean-up-and-optimization include/asm-generic/kmap_types.h --- a/include/asm-generic/kmap_types.h~kmap-types-clean-up-and-optimization +++ a/include/asm-generic/kmap_types.h @@ -2,37 +2,36 @@ #define _ASM_GENERIC_KMAP_TYPES_H #ifdef __WITH_KM_FENCE -# define KMAP_D(n) __KM_FENCE_##n , +# define KMAP_D(n) __KM_FENCE_##n, KM_##n #else -# define KMAP_D(n) +# define KMAP_D(n) KM_##n #endif enum km_type { -KMAP_D(0) KM_BOUNCE_READ, -KMAP_D(1) KM_SKB_SUNRPC_DATA, -KMAP_D(2) KM_SKB_DATA_SOFTIRQ, -KMAP_D(3) KM_USER0, -KMAP_D(4) KM_USER1, -KMAP_D(5) KM_BIO_SRC_IRQ, -KMAP_D(6) KM_BIO_DST_IRQ, -KMAP_D(7) KM_PTE0, -KMAP_D(8) KM_PTE1, -KMAP_D(9) KM_IRQ0, -KMAP_D(10) KM_IRQ1, -KMAP_D(11) KM_SOFTIRQ0, -KMAP_D(12) KM_SOFTIRQ1, -KMAP_D(13) KM_SYNC_ICACHE, -KMAP_D(14) KM_SYNC_DCACHE, -/* UML specific, for copy_*_user - used in do_op_one_page */ -KMAP_D(15) KM_UML_USERCOPY, -KMAP_D(16) KM_IRQ_PTE, -KMAP_D(17) KM_NMI, -KMAP_D(18) KM_NMI_PTE, -KMAP_D(19) KM_KDB, -/* - * Remember to update debug_kmap_atomic() when adding new kmap types! - */ -KMAP_D(20) KM_TYPE_NR + KMAP_D(BOUNCE_READ), +#if defined(CONFIG_SUNRPC) || defined(CONFIG_SUNRPC_MODULE) + KMAP_D(SKB_SUNRPC_DATA), +#endif + KMAP_D(SKB_DATA_SOFTIRQ), + KMAP_D(USER0), + KMAP_D(USER1), + KMAP_D(BIO_SRC_IRQ), + KMAP_D(BIO_DST_IRQ), +#if defined(CONFIG_X86) && defined(CONFIG_CRASH_DUMP) + KMAP_D(PTE0), +#endif + KMAP_D(IRQ0), + KMAP_D(IRQ1), + KMAP_D(SOFTIRQ0), + KMAP_D(SOFTIRQ1), +#ifdef CONFIG_UML /* for copy_*_user - used in do_op_one_page */ + KMAP_D(UML_USERCOPY), +#endif +#ifdef CONFIG_KGDB_KDB + KMAP_D(KDB), +#endif + + KMAP_D(TYPE_NR) }; #undef KMAP_D _ Patches currently in -mm which might be from JBeulich@xxxxxxxxxx are linux-next.patch kmap-types-clean-up-and-optimization.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html