The patch titled mac80211: introduce struct michael_mic_ctx and static helpers has been added to the -mm tree. Its filename is mac80211-introduce-struct-michael_mic_ctx-and-static-helpers.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://www.zip.com.au/~akpm/linux/patches/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: mac80211: introduce struct michael_mic_ctx and static helpers From: Harvey Harrison <harvey.harrison@xxxxxxxxx> Replace the existing macro with a static function, significantly shrinks the size of the produced object file. Signed-off-by: Harvey Harrison <harvey.harrison@xxxxxxxxx> Cc: "John W. Linville" <linville@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- net/mac80211/michael.c | 75 ++++++++++++++++++++------------------- net/mac80211/michael.h | 4 ++ 2 files changed, 44 insertions(+), 35 deletions(-) diff -puN net/mac80211/michael.c~mac80211-introduce-struct-michael_mic_ctx-and-static-helpers net/mac80211/michael.c --- a/net/mac80211/michael.c~mac80211-introduce-struct-michael_mic_ctx-and-static-helpers +++ a/net/mac80211/michael.c @@ -13,46 +13,52 @@ #include "michael.h" -#define michael_block(l, r) \ -do { \ - r ^= rol32(l, 17); \ - l += r; \ - r ^= ((l & 0xff00ff00) >> 8) | ((l & 0x00ff00ff) << 8); \ - l += r; \ - r ^= rol32(l, 3); \ - l += r; \ - r ^= ror32(l, 2); \ - l += r; \ -} while (0) +static void michael_block(struct michael_mic_ctx *mctx, u32 val) +{ + mctx->l ^= val; + mctx->r ^= rol32(mctx->l, 17); + mctx->l += mctx->r; + mctx->r ^= ((mctx->l & 0xff00ff00) >> 8) | + ((mctx->l & 0x00ff00ff) << 8); + mctx->l += mctx->r; + mctx->r ^= rol32(mctx->l, 3); + mctx->l += mctx->r; + mctx->r ^= ror32(mctx->l, 2); + mctx->l += mctx->r; +} + +static void michael_mic_hdr(struct michael_mic_ctx *mctx, + u8 *key, u8 *da, u8 *sa, u8 priority) +{ + mctx->l = get_unaligned_le32(key); + mctx->r = get_unaligned_le32(key + 4); + + /* + * A pseudo header (DA, SA, Priority, 0, 0, 0) is used in Michael MIC + * calculation, but it is _not_ transmitted + */ + michael_block(mctx, get_unaligned_le32(da)); + michael_block(mctx, get_unaligned_le16(&da[4]) | + (get_unaligned_le16(sa) << 16)); + michael_block(mctx, get_unaligned_le32(&sa[2])); + michael_block(mctx, priority); +} void michael_mic(u8 *key, u8 *da, u8 *sa, u8 priority, u8 *data, size_t data_len, u8 *mic) { - u32 l, r, val; + u32 val; size_t block, blocks, left; + struct michael_mic_ctx mctx; - l = get_unaligned_le32(key); - r = get_unaligned_le32(key + 4); - - /* A pseudo header (DA, SA, Priority, 0, 0, 0) is used in Michael MIC - * calculation, but it is _not_ transmitted */ - l ^= get_unaligned_le32(da); - michael_block(l, r); - l ^= get_unaligned_le16(&da[4]) | (get_unaligned_le16(sa) << 16); - michael_block(l, r); - l ^= get_unaligned_le32(&sa[2]); - michael_block(l, r); - l ^= priority; - michael_block(l, r); + michael_mic_hdr(&mctx, key, da, sa, priority); /* Real data */ blocks = data_len / 4; left = data_len % 4; - for (block = 0; block < blocks; block++) { - l ^= get_unaligned_le32(&data[block * 4]); - michael_block(l, r); - } + for (block = 0; block < blocks; block++) + michael_block(&mctx, get_unaligned_le32(&data[block * 4])); /* Partial block of 0..3 bytes and padding: 0x5a + 4..7 zeros to make * total length a multiple of 4. */ @@ -62,11 +68,10 @@ void michael_mic(u8 *key, u8 *da, u8 *sa left--; val |= data[blocks * 4 + left]; } - l ^= val; - michael_block(l, r); - /* last block is zero, so l ^ 0 = l */ - michael_block(l, r); - put_unaligned_le32(l, mic); - put_unaligned_le32(r, mic + 4); + michael_block(&mctx, val); + michael_block(&mctx, 0); + + put_unaligned_le32(mctx.l, mic); + put_unaligned_le32(mctx.r, mic + 4); } diff -puN net/mac80211/michael.h~mac80211-introduce-struct-michael_mic_ctx-and-static-helpers net/mac80211/michael.h --- a/net/mac80211/michael.h~mac80211-introduce-struct-michael_mic_ctx-and-static-helpers +++ a/net/mac80211/michael.h @@ -14,6 +14,10 @@ #define MICHAEL_MIC_LEN 8 +struct michael_mic_ctx { + u32 l, r; +}; + void michael_mic(u8 *key, u8 *da, u8 *sa, u8 priority, u8 *data, size_t data_len, u8 *mic); _ Patches currently in -mm which might be from harvey.harrison@xxxxxxxxx are origin.patch char-fix-sparse-shadowed-variable-warnings-in-espc.patch char-espc-fix-possible-double-unlock.patch char-rocketc-fix-sparse-variable-shadowing-and-int-as-null-pointer.patch cycladesc-fix-sparse-shadowed-variable-warnings.patch epcac-static-functions-and-integer-as-null-pointer-fixes.patch add-macros-similar-to-min-max-min_t-max_t.patch drivers-replace-remaining-__function__-occurrences.patch mm-remove-remaining-__function__-occurances.patch kernel-replace-remaining-__function__-occurances.patch lib-replace-remaining-__function__-occurances.patch afs-replace-remaining-__function__-occurrences.patch fs-replace-remaining-__function__-occurrences.patch drivers-char-replace-remaining-__function__-occurrences.patch serial-replace-remaining-__function__-occurrences.patch frv-unbreak-misalignment-handling-changes.patch cifs-remove-global_extern-macro.patch input-replace-remaining-__function__-occurrences.patch git-kvm.patch git-mips.patch nfs-replace-remaining-__function__-occurrences.patch parisc-replace-remaining-__function__-occurences.patch drivers-parisc-replace-remaining-__function__-occurrences.patch pcmcia-replace-remaining-__function__-occurrences.patch scsi-replace-remaining-__function__-occurrences.patch fusion-replace-remaining-__function__-occurrences.patch scsi-replace-__inline-with-inline.patch git-watchdog.patch mac80211-michaelc-use-kernel-provided-infrastructure.patch mac80211-introduce-struct-michael_mic_ctx-and-static-helpers.patch mac80211-tkipc-use-kernel-provided-infrastructure.patch mac80211-add-const-remove-unused-function-make-one-function-static.patch mac80211-add-a-struct-to-hold-tkip-context.patch mac80211-tkipc-use-struct-tkip_ctx-in-phase-1-key-mixing.patch mac80211-tkipc-use-struct-tkip_ctx-in-phase-2-key-mixing.patch git-xfs.patch xtensa-replace-remaining-__function__-occurences.patch ide-eliminate-fit-macro.patch ata-remove-fit-macro.patch b43-replace-limit_value-macro-with-clamp_val.patch b43legacy-replace-limit_value-macro-with-clamp_val.patch fuse-use-clamp-rather-than-nested-min-max.patch ide-tape-use-clamp_t-rather-than-nested-min_t-max_t.patch input-ff-memlessc-use-clamp_val-macro.patch dccp-ccid2c-ccid3c-use-clamp-clamp_t.patch block-remove-remaining-__function__-occurances.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