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Date: Fri, 20 Jul 2007 00:47:18 +0400 From: Alexey Dobriyan <adobriyan@...il.com> To: "Robert P. J. Day" <rpjday@...dspring.com> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH][RFC] Remove R/W semaphore content from generic semaphore.h headers. On Thu, Jul 19, 2007 at 05:37:58AM -0400, Robert P. J. Day wrote: > apparently, for historical reasons, virtually every generic > semaphore.h header file includes the more specific rwsem.h header > file. this is probably a bad thing, since someone who wants only a > generic semaphore shouldn't be forced to include rwsem definitions as > well if they don't need them. > > this patch removes all of those extraneous definitions, as well as > some other rwsem-related cruft. however, i wouldn't try to apply this > patch as is since it's almost guaranteed to introduce breakage. > chances are, there are some places in the code that use R/W semaphores > but are just *coincidentally* getting those definitions via > semaphore.h so everything works just fine. as soon as you remove that > include of <linux/rwsem.h> ... boom. > > the better solution would be for each arch maintainer to do this > cleanup for their own code, if they think it's worth it. No, the better solution is to setup a bunch of cross compilers instead of asking arch maintainers to clean up after you. If you don't want to do it, that's fine, but then refrain from touching core headers. > (note the > occasional definition of the macro RW_LOCK_BIAS, which also seems out > of place in a generic semaphore.h header file, and which clearly > belongs in rwsem.h.) > > include/asm-alpha/semaphore.h | 1 - > include/asm-arm/semaphore.h | 1 - > include/asm-arm26/semaphore.h | 1 - > include/asm-avr32/semaphore.h | 1 - > include/asm-cris/semaphore.h | 3 --- > include/asm-frv/semaphore.h | 3 --- > include/asm-h8300/semaphore.h | 1 - > include/asm-i386/semaphore.h | 1 - > include/asm-ia64/semaphore.h | 1 - > include/asm-m32r/semaphore.h | 1 - > include/asm-m68k/semaphore.h | 1 - > include/asm-m68knommu/semaphore.h | 1 - > include/asm-mips/semaphore.h | 8 -------- > include/asm-parisc/semaphore.h | 1 - > include/asm-powerpc/semaphore.h | 8 -------- > include/asm-s390/semaphore.h | 1 - > include/asm-sh/semaphore.h | 1 - > include/asm-sh64/semaphore.h | 1 - > include/asm-sparc/semaphore.h | 1 - > include/asm-sparc64/semaphore.h | 1 - > include/asm-v850/semaphore.h | 1 - > include/asm-x86_64/semaphore.h | 2 -- > include/asm-xtensa/semaphore.h | 1 - > 23 files changed, 42 deletions(-) - 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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